TY  - CONF
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Stijepovic, Ivan
AU  - Vijatović Petrović, Mirjana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2426
AB  - For the last decades, energy harvesters based on piezoelectricity from mechanical vibration (wind, human activities, vibrations of machines and traffic, ocean waves, and acoustic waves) are explored extensively for its functionality in energy technologies. Typical applications that could benefit from mechanical energy harvesting are that many sensors, alarms, LED lights, and other low-power and ultra-low-power devices can be driven energetically completely independently [1]. To fabricate a flexible piezoelectric energy harvester (FPEHs) that operates under various conditions, ceramic particles were blended with a polymer to form composite films.
Two-phase lead-free BaZr0.2Ti0.8/PVDF and lead-based PbZr0.52Ti0.48/PVDF piezocomposites, as well as three-phase PbZr0.52Ti0.48/Ni0.7Zn0.3Fe2O4/PVDF composites films with variable filler content (up to 50 vol.%) have been prepared by hot pressing method. Structure and morphology of piezo-active phase powders as well as distribution of filler in obtained flexible films were characterized by XRD and SEM analysis. Total amount of electroactive phase (% FEA) of PVDF in all films were investigated by FTIR analysis. In all composites dielectric permittivities was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strength and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in all types of flexible films. Also, ferromagnetic response was established in PZT/ferrite/PVDF films under magnetic field of 10 kOe.
Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of.
PB  - The Serbian Society for Ceramic Materials
C3  - 7th Conference of The Serbian Society for Ceramic Materials
T1  - TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2426
ER  - 

@conference{
author = "Bobić, Jelena and Ilić, Nikola and Despotovic, Zeljko V. and Džunuzović, Adis and Grigalaitis, Robertas and Stijepovic, Ivan and Vijatović Petrović, Mirjana",
year = "2023",
abstract = "For the last decades, energy harvesters based on piezoelectricity from mechanical vibration (wind, human activities, vibrations of machines and traffic, ocean waves, and acoustic waves) are explored extensively for its functionality in energy technologies. Typical applications that could benefit from mechanical energy harvesting are that many sensors, alarms, LED lights, and other low-power and ultra-low-power devices can be driven energetically completely independently [1]. To fabricate a flexible piezoelectric energy harvester (FPEHs) that operates under various conditions, ceramic particles were blended with a polymer to form composite films.
Two-phase lead-free BaZr0.2Ti0.8/PVDF and lead-based PbZr0.52Ti0.48/PVDF piezocomposites, as well as three-phase PbZr0.52Ti0.48/Ni0.7Zn0.3Fe2O4/PVDF composites films with variable filler content (up to 50 vol.%) have been prepared by hot pressing method. Structure and morphology of piezo-active phase powders as well as distribution of filler in obtained flexible films were characterized by XRD and SEM analysis. Total amount of electroactive phase (% FEA) of PVDF in all films were investigated by FTIR analysis. In all composites dielectric permittivities was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strength and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in all types of flexible films. Also, ferromagnetic response was established in PZT/ferrite/PVDF films under magnetic field of 10 kOe.
Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of.",
publisher = "The Serbian Society for Ceramic Materials",
journal = "7th Conference of The Serbian Society for Ceramic Materials",
title = "TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2426"
}

Bobić, J., Ilić, N., Despotovic, Z. V., Džunuzović, A., Grigalaitis, R., Stijepovic, I.,& Vijatović Petrović, M.. (2023). TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS. in 7th Conference of The Serbian Society for Ceramic Materials
The Serbian Society for Ceramic Materials..
https://hdl.handle.net/21.15107/rcub_rimsi_2426

Bobić J, Ilić N, Despotovic ZV, Džunuzović A, Grigalaitis R, Stijepovic I, Vijatović Petrović M. TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS. in 7th Conference of The Serbian Society for Ceramic Materials. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2426 .

Bobić, Jelena, Ilić, Nikola, Despotovic, Zeljko V., Džunuzović, Adis, Grigalaitis, Robertas, Stijepovic, Ivan, Vijatović Petrović, Mirjana, "TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS" in 7th Conference of The Serbian Society for Ceramic Materials (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2426 .

TY  - CONF
AU  - Vijatović Petrović, Mirjana
AU  - Craciun, Floriana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Galassi, Carmen
AU  - Stagnaro, Paola
AU  - Canu, Giovanna
AU  - Buscaglia, Maria Teresa
AU  - Brunengo, Elisabetta
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2430
AB  - 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3/polyvinylidene fluoride flexible composite films were prepared by the hot-pressing method. Surface modification of active phase particles was performed using two coupling agents, namely, (3- aminopropyl)triethoxysilane (APTES) and dodecyl triethoxysilane (DDTES) to enable good adhesion of active phase particles with the polymer matrix. The highest amount of electroactive PVDF β- phase was formed in APTES-modified samples while in DDTES samples mainly γ- phase was formed. Dielectric permittivity values and dielectric losses decreased for silanized samples due to reduced tension at the interface between particles and polymer. Strong intermolecular interaction between the PVDF chains and the APTES-modified particles led to enhanced breakdown strength of these samples. After the polarization of films, energy harvesting potential was evaluated for all samples. The highest voltage output of ~ 15 V and power ~ 225 μW were obtained for a single APTES-modified harvester [1-2].
PB  - The Serbian Society for Ceramic Materials
C3  - 7th Conference of The Serbian Society for Ceramic Materials
T1  - ENHANCED PROPERTIES OF PVDF COMPOSITES BY ACTIVE PHASE SILANIZATION
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2430
ER  - 

@conference{
author = "Vijatović Petrović, Mirjana and Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Ilić, Nikola and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Galassi, Carmen and Stagnaro, Paola and Canu, Giovanna and Buscaglia, Maria Teresa and Brunengo, Elisabetta",
year = "2023",
abstract = "0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3/polyvinylidene fluoride flexible composite films were prepared by the hot-pressing method. Surface modification of active phase particles was performed using two coupling agents, namely, (3- aminopropyl)triethoxysilane (APTES) and dodecyl triethoxysilane (DDTES) to enable good adhesion of active phase particles with the polymer matrix. The highest amount of electroactive PVDF β- phase was formed in APTES-modified samples while in DDTES samples mainly γ- phase was formed. Dielectric permittivity values and dielectric losses decreased for silanized samples due to reduced tension at the interface between particles and polymer. Strong intermolecular interaction between the PVDF chains and the APTES-modified particles led to enhanced breakdown strength of these samples. After the polarization of films, energy harvesting potential was evaluated for all samples. The highest voltage output of ~ 15 V and power ~ 225 μW were obtained for a single APTES-modified harvester [1-2].",
publisher = "The Serbian Society for Ceramic Materials",
journal = "7th Conference of The Serbian Society for Ceramic Materials",
title = "ENHANCED PROPERTIES OF PVDF COMPOSITES BY ACTIVE PHASE SILANIZATION",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2430"
}

Vijatović Petrović, M., Craciun, F., Cordero, F., MERCADELLI, E., Ilić, N., Despotovic, Z. V., Bobić, J., Džunuzović, A., Galassi, C., Stagnaro, P., Canu, G., Buscaglia, M. T.,& Brunengo, E.. (2023). ENHANCED PROPERTIES OF PVDF COMPOSITES BY ACTIVE PHASE SILANIZATION. in 7th Conference of The Serbian Society for Ceramic Materials
The Serbian Society for Ceramic Materials..
https://hdl.handle.net/21.15107/rcub_rimsi_2430

Vijatović Petrović M, Craciun F, Cordero F, MERCADELLI E, Ilić N, Despotovic ZV, Bobić J, Džunuzović A, Galassi C, Stagnaro P, Canu G, Buscaglia MT, Brunengo E. ENHANCED PROPERTIES OF PVDF COMPOSITES BY ACTIVE PHASE SILANIZATION. in 7th Conference of The Serbian Society for Ceramic Materials. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2430 .

Vijatović Petrović, Mirjana, Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Ilić, Nikola, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Galassi, Carmen, Stagnaro, Paola, Canu, Giovanna, Buscaglia, Maria Teresa, Brunengo, Elisabetta, "ENHANCED PROPERTIES OF PVDF COMPOSITES BY ACTIVE PHASE SILANIZATION" in 7th Conference of The Serbian Society for Ceramic Materials (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2430 .

TY  - CONF
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Stijepovic, Ivan
AU  - Vijatović Petrović, Mirjana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2429
AB  - In the last year energy harvesters based on piezoelectricity from mechanical vibration has emerged as the very promising devices that are explored extensively for its functionality in energy technologies. In this paper a series of flexible lead- free BZT/PVDF and lead based PZT/PVDF piezocomposites with variable filler content up to 50 vol. % have been prepared by hot pressing method. Structure and morphology of BZT and PZT powders as well as distribution of piezo-active filler in obtained flexible films were characterized by XRD and SEM analysis. Total amoun of electro active phase (% FEA) of PVDF is higher in PZT-based films in comparison with BZT based ones but the contribution of more desirable β- phase is higher in BZT-PVDF films. In both composite dielectric permittivity's was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strenght and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in both types of flexible films. Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of BZT and PZT active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of lead based and lead free flexible films as well as potential use of those films as energy storage and energy harvesting systems were considered.
PB  - 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
C3  - 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
T1  - Lead Free (BaZr0.2Ti0.8O3) and Lead Based (PbZr0.52Ti0.48O3) Flexible Thick Films: Structural Properties and Potential Use as Energy Storage and Energy Harvesting Systems
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2429
ER  - 

@conference{
author = "Bobić, Jelena and Ilić, Nikola and Despotovic, Zeljko V. and Džunuzović, Adis and Grigalaitis, Robertas and Stijepovic, Ivan and Vijatović Petrović, Mirjana",
year = "2023",
abstract = "In the last year energy harvesters based on piezoelectricity from mechanical vibration has emerged as the very promising devices that are explored extensively for its functionality in energy technologies. In this paper a series of flexible lead- free BZT/PVDF and lead based PZT/PVDF piezocomposites with variable filler content up to 50 vol. % have been prepared by hot pressing method. Structure and morphology of BZT and PZT powders as well as distribution of piezo-active filler in obtained flexible films were characterized by XRD and SEM analysis. Total amoun of electro active phase (% FEA) of PVDF is higher in PZT-based films in comparison with BZT based ones but the contribution of more desirable β- phase is higher in BZT-PVDF films. In both composite dielectric permittivity's was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strenght and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in both types of flexible films. Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of BZT and PZT active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of lead based and lead free flexible films as well as potential use of those films as energy storage and energy harvesting systems were considered.",
publisher = "7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain",
journal = "7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain",
title = "Lead Free (BaZr0.2Ti0.8O3) and Lead Based (PbZr0.52Ti0.48O3) Flexible Thick Films: Structural Properties and Potential Use as Energy Storage and Energy Harvesting Systems",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2429"
}

Bobić, J., Ilić, N., Despotovic, Z. V., Džunuzović, A., Grigalaitis, R., Stijepovic, I.,& Vijatović Petrović, M.. (2023). Lead Free (BaZr0.2Ti0.8O3) and Lead Based (PbZr0.52Ti0.48O3) Flexible Thick Films: Structural Properties and Potential Use as Energy Storage and Energy Harvesting Systems. in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain..
https://hdl.handle.net/21.15107/rcub_rimsi_2429

Bobić J, Ilić N, Despotovic ZV, Džunuzović A, Grigalaitis R, Stijepovic I, Vijatović Petrović M. Lead Free (BaZr0.2Ti0.8O3) and Lead Based (PbZr0.52Ti0.48O3) Flexible Thick Films: Structural Properties and Potential Use as Energy Storage and Energy Harvesting Systems. in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2429 .

Bobić, Jelena, Ilić, Nikola, Despotovic, Zeljko V., Džunuzović, Adis, Grigalaitis, Robertas, Stijepovic, Ivan, Vijatović Petrović, Mirjana, "Lead Free (BaZr0.2Ti0.8O3) and Lead Based (PbZr0.52Ti0.48O3) Flexible Thick Films: Structural Properties and Potential Use as Energy Storage and Energy Harvesting Systems" in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2429 .

TY  - CONF
AU  - Vijatović Petrović, Mirjana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Brunengo, Elisabetta
AU  - Ilić, Nikola
AU  - Galassi, Carmen
AU  - Despotovic, Zeljko V.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Stagnaro, Paola
AU  - Canu, Giovanna
AU  - Craciun, Floriana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2423
AB  - Energy  is  available  all  around  us  in  different  forms  and  shapes  such  as  from  sun,  wind,  waves,  vibrations  etc. The  enormous  amount  of  mechanical  energy  released  in  everyday  life  by  human  walking,  transportation   movement,   sound   waves   and   other,    represent   renewable   and   safe   energy   source.   Piezoelectric  generators  exhibit  a  great  potential  for  powering  up  low-power  portable  devices  and  self-powered  electronic  systems  by  extraction  of  mechanical  energy.  Employment  of  lead-free  piezoelectric  materials will  be  a  breakthrough  of  a  completely  new  type  of  safe  and  harmless  production  of  energy  for  daily life. Recent challenge in electronics is also utilization of flexible electronics with the ability to bend into diverse shapes which expands the applications of modern electronic devices in different areas.Polymer PVDF/piezoelectric ceramics,  flexible  composite  films  were  prepared  by  hot  pressing  method. The  influence  of  hot  pressing  method  on  the  formation  of  electroactive  PVDF  phases  in  the  polymer was proven by FTIR analysis.  DSC analysis have shown the change of PVDF crystallinity degree in  the  flexible  films  with  addition  of  ceramics  filler  particles.  The  dielectric  permittivity value  increased  with the addition of filler in the polymer matrix while the relaxation processes were governed mostly by the PVDF matrix. Polarization of flexible films enhanced the formation of PVDF electroactive β- phase in the samples. Energy  harvesting  potential  was  studied  by measuring  of voltage  output  under  the  impulse  hammer load.
PB  - 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
C3  - 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
T1  - Energy Harvesting Potential of Polymer Composites
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2423
ER  - 

@conference{
author = "Vijatović Petrović, Mirjana and Cordero, Francesco and MERCADELLI, ELISA and Brunengo, Elisabetta and Ilić, Nikola and Galassi, Carmen and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Stagnaro, Paola and Canu, Giovanna and Craciun, Floriana",
year = "2023",
abstract = "Energy  is  available  all  around  us  in  different  forms  and  shapes  such  as  from  sun,  wind,  waves,  vibrations  etc. The  enormous  amount  of  mechanical  energy  released  in  everyday  life  by  human  walking,  transportation   movement,   sound   waves   and   other,    represent   renewable   and   safe   energy   source.   Piezoelectric  generators  exhibit  a  great  potential  for  powering  up  low-power  portable  devices  and  self-powered  electronic  systems  by  extraction  of  mechanical  energy.  Employment  of  lead-free  piezoelectric  materials will  be  a  breakthrough  of  a  completely  new  type  of  safe  and  harmless  production  of  energy  for  daily life. Recent challenge in electronics is also utilization of flexible electronics with the ability to bend into diverse shapes which expands the applications of modern electronic devices in different areas.Polymer PVDF/piezoelectric ceramics,  flexible  composite  films  were  prepared  by  hot  pressing  method. The  influence  of  hot  pressing  method  on  the  formation  of  electroactive  PVDF  phases  in  the  polymer was proven by FTIR analysis.  DSC analysis have shown the change of PVDF crystallinity degree in  the  flexible  films  with  addition  of  ceramics  filler  particles.  The  dielectric  permittivity value  increased  with the addition of filler in the polymer matrix while the relaxation processes were governed mostly by the PVDF matrix. Polarization of flexible films enhanced the formation of PVDF electroactive β- phase in the samples. Energy  harvesting  potential  was  studied  by measuring  of voltage  output  under  the  impulse  hammer load.",
publisher = "7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain",
journal = "7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain",
title = "Energy Harvesting Potential of Polymer Composites",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2423"
}

Vijatović Petrović, M., Cordero, F., MERCADELLI, E., Brunengo, E., Ilić, N., Galassi, C., Despotovic, Z. V., Bobić, J., Džunuzović, A., Stagnaro, P., Canu, G.,& Craciun, F.. (2023). Energy Harvesting Potential of Polymer Composites. in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain
7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain..
https://hdl.handle.net/21.15107/rcub_rimsi_2423

Vijatović Petrović M, Cordero F, MERCADELLI E, Brunengo E, Ilić N, Galassi C, Despotovic ZV, Bobić J, Džunuzović A, Stagnaro P, Canu G, Craciun F. Energy Harvesting Potential of Polymer Composites. in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2423 .

Vijatović Petrović, Mirjana, Cordero, Francesco, MERCADELLI, ELISA, Brunengo, Elisabetta, Ilić, Nikola, Galassi, Carmen, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Stagnaro, Paola, Canu, Giovanna, Craciun, Floriana, "Energy Harvesting Potential of Polymer Composites" in 7th World Congress on Materials science and Engineering, 5th World Congress on Lasers, Optics and Photonics, joint event, Valencia, Spain (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2423 .

TY  - JOUR
AU  - Craciun, Floriana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Ilić, Nikola
AU  - Galassi, Carmen
AU  - Baldisserri, Carlo
AU  - Bobić, Jelena
AU  - Stagnaro, Paola
AU  - Canu, Giovanna
AU  - Buscaglia, Maria Teresa
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2125
AB  - In the last years, ultrasound energy harvesting has emerged as the most promising technique for wireless power supply of implanted medical devices. These devices require flexible piezoelectric materials with high piezoelectric response in the ultrasonic range. Here we report on bio-compatible NBT-BT/PVDF flexible composites, with variable filler content up to 50 vol%, prepared by a properly designed and optimized process, which incorporates in a complex connectivity pattern fully sintered NBT-BT crystalline powders in a PVDF matrix. The dielectric constant of the flexible composites increased from 10 of pure PVDF polymer to 110 of composite films with 50 vol% NBT-BT content, while the high frequency piezoelectric d33 constant increased from 0.2 pC/N to 33 pC/N for the same samples. The composite with 50 vol% NBT-BT exhibits the figure of merit for the harvested ultrasound energy d33g33 ≅ 1.54 × 10−12 m3/J, which is comparable to the figure of merit for the NBT-BT piezoelectric ceramic (1.8 × 10−12 m3/J) and higher than other reported results for random composites. Based on these results, this study provides an easy method to fabricate random flexible piezoelectric composites with enhanced high frequency piezoelectric response and high energy density harvested from an ultrasound source.
PB  - Elsevier Ltd
T2  - Composites Part B: Engineering
T1  - Flexible composite films with enhanced piezoelectric properties for energy harvesting and wireless ultrasound-powered technology
SP  - 110835
VL  - 263
DO  - 10.1016/j.compositesb.2023.110835
ER  - 

@article{
author = "Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Ilić, Nikola and Galassi, Carmen and Baldisserri, Carlo and Bobić, Jelena and Stagnaro, Paola and Canu, Giovanna and Buscaglia, Maria Teresa and Džunuzović, Adis and Vijatović Petrović, Mirjana",
year = "2023",
abstract = "In the last years, ultrasound energy harvesting has emerged as the most promising technique for wireless power supply of implanted medical devices. These devices require flexible piezoelectric materials with high piezoelectric response in the ultrasonic range. Here we report on bio-compatible NBT-BT/PVDF flexible composites, with variable filler content up to 50 vol%, prepared by a properly designed and optimized process, which incorporates in a complex connectivity pattern fully sintered NBT-BT crystalline powders in a PVDF matrix. The dielectric constant of the flexible composites increased from 10 of pure PVDF polymer to 110 of composite films with 50 vol% NBT-BT content, while the high frequency piezoelectric d33 constant increased from 0.2 pC/N to 33 pC/N for the same samples. The composite with 50 vol% NBT-BT exhibits the figure of merit for the harvested ultrasound energy d33g33 ≅ 1.54 × 10−12 m3/J, which is comparable to the figure of merit for the NBT-BT piezoelectric ceramic (1.8 × 10−12 m3/J) and higher than other reported results for random composites. Based on these results, this study provides an easy method to fabricate random flexible piezoelectric composites with enhanced high frequency piezoelectric response and high energy density harvested from an ultrasound source.",
publisher = "Elsevier Ltd",
journal = "Composites Part B: Engineering",
title = "Flexible composite films with enhanced piezoelectric properties for energy harvesting and wireless ultrasound-powered technology",
pages = "110835",
volume = "263",
doi = "10.1016/j.compositesb.2023.110835"
}

Craciun, F., Cordero, F., MERCADELLI, E., Ilić, N., Galassi, C., Baldisserri, C., Bobić, J., Stagnaro, P., Canu, G., Buscaglia, M. T., Džunuzović, A.,& Vijatović Petrović, M.. (2023). Flexible composite films with enhanced piezoelectric properties for energy harvesting and wireless ultrasound-powered technology. in Composites Part B: Engineering
Elsevier Ltd., 263, 110835.
https://doi.org/10.1016/j.compositesb.2023.110835

Craciun F, Cordero F, MERCADELLI E, Ilić N, Galassi C, Baldisserri C, Bobić J, Stagnaro P, Canu G, Buscaglia MT, Džunuzović A, Vijatović Petrović M. Flexible composite films with enhanced piezoelectric properties for energy harvesting and wireless ultrasound-powered technology. in Composites Part B: Engineering. 2023;263:110835.
doi:10.1016/j.compositesb.2023.110835 .

Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Ilić, Nikola, Galassi, Carmen, Baldisserri, Carlo, Bobić, Jelena, Stagnaro, Paola, Canu, Giovanna, Buscaglia, Maria Teresa, Džunuzović, Adis, Vijatović Petrović, Mirjana, "Flexible composite films with enhanced piezoelectric properties for energy harvesting and wireless ultrasound-powered technology" in Composites Part B: Engineering, 263 (2023):110835,
https://doi.org/10.1016/j.compositesb.2023.110835 . .

TY  - JOUR
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Stijepovic, Ivan
AU  - Stojanovic, Biljana
AU  - Vijatović Petrović, Mirjana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2124
AB  - For the last several decades, energy harvesters based on piezoelectricity from mechanical
vibration have emerged as very promising devices that are being explored extensively for their
functionality in energy technologies. In this paper, a series of flexible lead-free BaZr0.2Ti0.8O3
(BZT)/PVDF and lead-based PbZr0.52Ti0.48O3 (PZT)/PVDF piezocomposites with variable filler
content up to 50 vol% were prepared by a hot pressing method. The structure and morphology
of the BZT and PZT powders, as well as the distribution of the piezo-active filler in the obtained
flexible films were characterized by XRD and SEM analysis. In addition, the remnant polarization
(Pr) and leakage current were also investigated to evaluate the breakdown strength in both types of flexible films. The calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with an increasing amount of BZT and PZT active phases.
The maximum storage energy of 0.42 J/cm3 (and energy efficiency of 40.7 %) was obtained for the
PZT–PVDF (40–60) films, while the maximum output voltage of about 10 V (~10 μA) was obtained
for the PZT–PVDF (50–50) flexible film. In addition, a comparison between the properties of the
lead-based and lead-free flexible films, as well as the potential use of these films as energy storage and energy harvesting systems were analyzed.
PB  - MDPI, Basel, Switzerland
T2  - Crystals
T1  - Properties and Potential Application of Lead-Free (BaZr0.2Ti0.8O3) and Lead-Based (PbZr0.52Ti0.48O3) Flexible Thick Films
IS  - 8
SP  - 1178
VL  - 13
DO  - 10.3390/cryst13081178
ER  - 

@article{
author = "Bobić, Jelena and Ilić, Nikola and Despotovic, Zeljko V. and Džunuzović, Adis and Grigalaitis, Robertas and Stijepovic, Ivan and Stojanovic, Biljana and Vijatović Petrović, Mirjana",
year = "2023",
abstract = "For the last several decades, energy harvesters based on piezoelectricity from mechanical
vibration have emerged as very promising devices that are being explored extensively for their
functionality in energy technologies. In this paper, a series of flexible lead-free BaZr0.2Ti0.8O3
(BZT)/PVDF and lead-based PbZr0.52Ti0.48O3 (PZT)/PVDF piezocomposites with variable filler
content up to 50 vol% were prepared by a hot pressing method. The structure and morphology
of the BZT and PZT powders, as well as the distribution of the piezo-active filler in the obtained
flexible films were characterized by XRD and SEM analysis. In addition, the remnant polarization
(Pr) and leakage current were also investigated to evaluate the breakdown strength in both types of flexible films. The calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with an increasing amount of BZT and PZT active phases.
The maximum storage energy of 0.42 J/cm3 (and energy efficiency of 40.7 %) was obtained for the
PZT–PVDF (40–60) films, while the maximum output voltage of about 10 V (~10 μA) was obtained
for the PZT–PVDF (50–50) flexible film. In addition, a comparison between the properties of the
lead-based and lead-free flexible films, as well as the potential use of these films as energy storage and energy harvesting systems were analyzed.",
publisher = "MDPI, Basel, Switzerland",
journal = "Crystals",
title = "Properties and Potential Application of Lead-Free (BaZr0.2Ti0.8O3) and Lead-Based (PbZr0.52Ti0.48O3) Flexible Thick Films",
number = "8",
pages = "1178",
volume = "13",
doi = "10.3390/cryst13081178"
}

Bobić, J., Ilić, N., Despotovic, Z. V., Džunuzović, A., Grigalaitis, R., Stijepovic, I., Stojanovic, B.,& Vijatović Petrović, M.. (2023). Properties and Potential Application of Lead-Free (BaZr0.2Ti0.8O3) and Lead-Based (PbZr0.52Ti0.48O3) Flexible Thick Films. in Crystals
MDPI, Basel, Switzerland., 13(8), 1178.
https://doi.org/10.3390/cryst13081178

Bobić J, Ilić N, Despotovic ZV, Džunuzović A, Grigalaitis R, Stijepovic I, Stojanovic B, Vijatović Petrović M. Properties and Potential Application of Lead-Free (BaZr0.2Ti0.8O3) and Lead-Based (PbZr0.52Ti0.48O3) Flexible Thick Films. in Crystals. 2023;13(8):1178.
doi:10.3390/cryst13081178 .

Bobić, Jelena, Ilić, Nikola, Despotovic, Zeljko V., Džunuzović, Adis, Grigalaitis, Robertas, Stijepovic, Ivan, Stojanovic, Biljana, Vijatović Petrović, Mirjana, "Properties and Potential Application of Lead-Free (BaZr0.2Ti0.8O3) and Lead-Based (PbZr0.52Ti0.48O3) Flexible Thick Films" in Crystals, 13, no. 8 (2023):1178,
https://doi.org/10.3390/cryst13081178 . .

TY  - CONF
AU  - Despotovic, Zeljko V.
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2520
AB  - The paper presents the implementation of a
synchronous “buck“ power converter that is used to energy
harvesting from vibrating structures that oscillate in the 1Hz-
1kHz range. This range is the most common in real cases. In
addition to the frequency, a very important parameter is also
the amplitude of the vibrations. Usually, low frequencies (<
10Hz) are associated with larger oscillatory masses and larger
oscillation amplitudes, while higher frequencies (1kHz >f >
100Hz) refer to larger oscillatory masses and smaller oscillation
amplitudes. The realized power converter is based on the
integrated circuit LT3588-1, in which it integrates a low-loss
full-wave bridge rectifier with a high efficiency synchronous
“buck” converter to form a complete energy harvesting
solution optimized for high output impedance of
mechanic/electric converter such as piezoelectric lead zirconate
titanate (PZT) ceramics or polymer based on polyvinylidene
fluoride (PVDF), or other composite. The paper presents
experimental results obtained on the vibration platform as
vibration source, in order to testing of the proposed power
converter in laboratory conditions.
PB  - 22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia
C3  - 22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia
T1  - A Realisation of Synchronous Buck Power Converter for Energy Harvesting from Vibrations
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2520
ER  - 

@conference{
author = "Despotovic, Zeljko V. and Vijatović Petrović, Mirjana and Bobić, Jelena",
year = "2023",
abstract = "The paper presents the implementation of a
synchronous “buck“ power converter that is used to energy
harvesting from vibrating structures that oscillate in the 1Hz-
1kHz range. This range is the most common in real cases. In
addition to the frequency, a very important parameter is also
the amplitude of the vibrations. Usually, low frequencies (<
10Hz) are associated with larger oscillatory masses and larger
oscillation amplitudes, while higher frequencies (1kHz >f >
100Hz) refer to larger oscillatory masses and smaller oscillation
amplitudes. The realized power converter is based on the
integrated circuit LT3588-1, in which it integrates a low-loss
full-wave bridge rectifier with a high efficiency synchronous
“buck” converter to form a complete energy harvesting
solution optimized for high output impedance of
mechanic/electric converter such as piezoelectric lead zirconate
titanate (PZT) ceramics or polymer based on polyvinylidene
fluoride (PVDF), or other composite. The paper presents
experimental results obtained on the vibration platform as
vibration source, in order to testing of the proposed power
converter in laboratory conditions.",
publisher = "22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia",
journal = "22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia",
title = "A Realisation of Synchronous Buck Power Converter for Energy Harvesting from Vibrations",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2520"
}

Despotovic, Z. V., Vijatović Petrović, M.,& Bobić, J.. (2023). A Realisation of Synchronous Buck Power Converter for Energy Harvesting from Vibrations. in 22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia
22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2520

Despotovic ZV, Vijatović Petrović M, Bobić J. A Realisation of Synchronous Buck Power Converter for Energy Harvesting from Vibrations. in 22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2520 .

Despotovic, Zeljko V., Vijatović Petrović, Mirjana, Bobić, Jelena, "A Realisation of Synchronous Buck Power Converter for Energy Harvesting from Vibrations" in 22nd International Symposium on POWER ELECTRONICS Ee2023, 25-28.10.2023., Novi Sad, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2520 .

TY  - CONF
AU  - Despotovic, Zeljko V.
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2505
AB  - U radu je predstavljen visokonaponski sistem za polarizaciju ultra
tankih filmova poliviniliden fluorida (PVDF) posredstvom visokonaponske korone.
PVDF je polimer sa jedinstvenim karakteristikama, kao što su piezoelektrične i
feroelektrične. Perspektiva primene ovih filmova je u sistemima za sakupljanje energije
iz mehaničkih vibracionih struktura koje generišu široki spektar učestanosti vibracija.
Veoma važan postupak koji obezbeđuje funkcionalnost proizvedenih PVDF tankih
filmova je visokonaponska polarizacija domena (tzv. polingovanje). Ovde su kvalitet i
preciznost visokog napona koji se generiše iz visokonaponskog energetskog pretvarača
veoma bitni sa aspekta kvaliteta polarizacije PVDF uzoraka. U radu je prikazan
konkretno realizovan visokonaponski energetski AC/DC pretvarač 230 V, 50Hz/0-5
kVdc, maksimalne izlazne snage 50 W, koji u potpunosti ispunjava tehničke zahteve
polarizacije PVDF uzoraka.
PB  - Simpozijum CIGRE 2023, Zlatibor, Srbija
C3  - Simpozijum CIGRE 2023, Zlatibor, Srbija
T1  - VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2505
ER  - 

@conference{
author = "Despotovic, Zeljko V. and Vijatović Petrović, Mirjana and Bobić, Jelena",
year = "2023",
abstract = "U radu je predstavljen visokonaponski sistem za polarizaciju ultra
tankih filmova poliviniliden fluorida (PVDF) posredstvom visokonaponske korone.
PVDF je polimer sa jedinstvenim karakteristikama, kao što su piezoelektrične i
feroelektrične. Perspektiva primene ovih filmova je u sistemima za sakupljanje energije
iz mehaničkih vibracionih struktura koje generišu široki spektar učestanosti vibracija.
Veoma važan postupak koji obezbeđuje funkcionalnost proizvedenih PVDF tankih
filmova je visokonaponska polarizacija domena (tzv. polingovanje). Ovde su kvalitet i
preciznost visokog napona koji se generiše iz visokonaponskog energetskog pretvarača
veoma bitni sa aspekta kvaliteta polarizacije PVDF uzoraka. U radu je prikazan
konkretno realizovan visokonaponski energetski AC/DC pretvarač 230 V, 50Hz/0-5
kVdc, maksimalne izlazne snage 50 W, koji u potpunosti ispunjava tehničke zahteve
polarizacije PVDF uzoraka.",
publisher = "Simpozijum CIGRE 2023, Zlatibor, Srbija",
journal = "Simpozijum CIGRE 2023, Zlatibor, Srbija",
title = "VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2505"
}

Despotovic, Z. V., Vijatović Petrović, M.,& Bobić, J.. (2023). VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA. in Simpozijum CIGRE 2023, Zlatibor, Srbija
Simpozijum CIGRE 2023, Zlatibor, Srbija..
https://hdl.handle.net/21.15107/rcub_rimsi_2505

Despotovic ZV, Vijatović Petrović M, Bobić J. VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA. in Simpozijum CIGRE 2023, Zlatibor, Srbija. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2505 .

Despotovic, Zeljko V., Vijatović Petrović, Mirjana, Bobić, Jelena, "VISOKONAPONSKI IZVOR NAPAJANJA ZA KORONA POLARIZACIJU TANKIH PVDF FILMOVA" in Simpozijum CIGRE 2023, Zlatibor, Srbija (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2505 .

TY  - CONF
AU  - Despotovic, Zeljko V.
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - MERCADELLI, ELISA
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2126
AB  - The paper presents the realization of an experimental setup used for testing energy harvesting and storage devices based on the use of lead-free bismuth sodium titanate-barium titanate (NBT-BT) in combination with polyvinylidene fluoride (PVDF) polymer. PVDF is a polymer matrix in which
piezoelectric phase is dispersed and enables formation of flexible films by hot pressing method. The paper presents an electromechanical model of a typical PVDF module, generates a
simulation model, and presents simulation results. The experimental setup is based on a mechanical excitation for generating pulses of an force of different amplitude and duration,
applied on the aforementioned energy harvesting NBT-BT-PVDF devices, likewise, on an electronic assembly for measuring the pulses of electrical quantities (current and voltage), that are
generated at the output electrodes. The research in this paper is predominantly experimental and it shows the obtained oscilloscope recordings of the excitation force and output voltage
of energy harvesting modules at different modes and conditionsof mechanical excitation. After this, a comparison of the simulation and experimental results is made.
PB  - IEEE
C3  - 22nd International Symposium INFOTEH-JAHORINA
T1  - Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films
DO  - 10.1109/INFOTEH57020.2023.10094150
ER  - 

@conference{
author = "Despotovic, Zeljko V. and Vijatović Petrović, Mirjana and Bobić, Jelena and Džunuzović, Adis and MERCADELLI, ELISA",
year = "2023",
abstract = "The paper presents the realization of an experimental setup used for testing energy harvesting and storage devices based on the use of lead-free bismuth sodium titanate-barium titanate (NBT-BT) in combination with polyvinylidene fluoride (PVDF) polymer. PVDF is a polymer matrix in which
piezoelectric phase is dispersed and enables formation of flexible films by hot pressing method. The paper presents an electromechanical model of a typical PVDF module, generates a
simulation model, and presents simulation results. The experimental setup is based on a mechanical excitation for generating pulses of an force of different amplitude and duration,
applied on the aforementioned energy harvesting NBT-BT-PVDF devices, likewise, on an electronic assembly for measuring the pulses of electrical quantities (current and voltage), that are
generated at the output electrodes. The research in this paper is predominantly experimental and it shows the obtained oscilloscope recordings of the excitation force and output voltage
of energy harvesting modules at different modes and conditionsof mechanical excitation. After this, a comparison of the simulation and experimental results is made.",
publisher = "IEEE",
journal = "22nd International Symposium INFOTEH-JAHORINA",
title = "Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films",
doi = "10.1109/INFOTEH57020.2023.10094150"
}

Despotovic, Z. V., Vijatović Petrović, M., Bobić, J., Džunuzović, A.,& MERCADELLI, E.. (2023). Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films. in 22nd International Symposium INFOTEH-JAHORINA
IEEE..
https://doi.org/10.1109/INFOTEH57020.2023.10094150

Despotovic ZV, Vijatović Petrović M, Bobić J, Džunuzović A, MERCADELLI E. Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films. in 22nd International Symposium INFOTEH-JAHORINA. 2023;.
doi:10.1109/INFOTEH57020.2023.10094150 .

Despotovic, Zeljko V., Vijatović Petrović, Mirjana, Bobić, Jelena, Džunuzović, Adis, MERCADELLI, ELISA, "Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films" in 22nd International Symposium INFOTEH-JAHORINA (2023),
https://doi.org/10.1109/INFOTEH57020.2023.10094150 . .

TY  - CONF
AU  - Ilić, Nikola
AU  - Dojčinović, Milena
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Radojković, Aleksandar
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2526
AB  - Bismuth ferrite (BiFeO3) powders were synthesized by auto-combustion
method. To decrease the quantity of active phase and improve the specific surface
area, composites of BiFeO3 and natural porose materials (diatomaceous earth and
cuttlebone) were prepared by chemical method from solution and calcined at low
temperature. Such obtained powders were used as adsorbents and photocatalysts in
methylene blue water solutions. Nature of photocatalysis under visible and UV-Vis
light was examined under different pH conditions and presence of hydrogen
peroxide, dissolved iron(III), oxalates and some other ions. Methylene blue is
capable to absorb sunlight and insert electrons into semiconductor, so possibility of
this way achieved dye-sensitization was studied [1]. Composites expressed better
properties than individual components confirming the synergetic effect [2]. Acidic
conditions were more suitable for decolorization, so possible Fenton reaction based
homogeneous catalysis was also considered.
PB  - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
C3  - 6th Conference of The Serbian Society for Ceramic Materials, Belgrade, Serbia, 28-29 June 2022
T1  - NATURE OF PHOTOCATALYSIS IN BiFeO3 SUSPENSIONS – HETEROGENEOUS, HOMOGENEOUS OR DYE-SENSITIZED?
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2526
ER  - 

@conference{
author = "Ilić, Nikola and Dojčinović, Milena and Vijatović Petrović, Mirjana and Bobić, Jelena and Džunuzović, Adis and Radojković, Aleksandar",
year = "2022",
abstract = "Bismuth ferrite (BiFeO3) powders were synthesized by auto-combustion
method. To decrease the quantity of active phase and improve the specific surface
area, composites of BiFeO3 and natural porose materials (diatomaceous earth and
cuttlebone) were prepared by chemical method from solution and calcined at low
temperature. Such obtained powders were used as adsorbents and photocatalysts in
methylene blue water solutions. Nature of photocatalysis under visible and UV-Vis
light was examined under different pH conditions and presence of hydrogen
peroxide, dissolved iron(III), oxalates and some other ions. Methylene blue is
capable to absorb sunlight and insert electrons into semiconductor, so possibility of
this way achieved dye-sensitization was studied [1]. Composites expressed better
properties than individual components confirming the synergetic effect [2]. Acidic
conditions were more suitable for decolorization, so possible Fenton reaction based
homogeneous catalysis was also considered.",
publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia",
journal = "6th Conference of The Serbian Society for Ceramic Materials, Belgrade, Serbia, 28-29 June 2022",
title = "NATURE OF PHOTOCATALYSIS IN BiFeO3 SUSPENSIONS – HETEROGENEOUS, HOMOGENEOUS OR DYE-SENSITIZED?",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2526"
}

Ilić, N., Dojčinović, M., Vijatović Petrović, M., Bobić, J., Džunuzović, A.,& Radojković, A.. (2022). NATURE OF PHOTOCATALYSIS IN BiFeO3 SUSPENSIONS – HETEROGENEOUS, HOMOGENEOUS OR DYE-SENSITIZED?. in 6th Conference of The Serbian Society for Ceramic Materials, Belgrade, Serbia, 28-29 June 2022
Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2526

Ilić N, Dojčinović M, Vijatović Petrović M, Bobić J, Džunuzović A, Radojković A. NATURE OF PHOTOCATALYSIS IN BiFeO3 SUSPENSIONS – HETEROGENEOUS, HOMOGENEOUS OR DYE-SENSITIZED?. in 6th Conference of The Serbian Society for Ceramic Materials, Belgrade, Serbia, 28-29 June 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_rimsi_2526 .

Ilić, Nikola, Dojčinović, Milena, Vijatović Petrović, Mirjana, Bobić, Jelena, Džunuzović, Adis, Radojković, Aleksandar, "NATURE OF PHOTOCATALYSIS IN BiFeO3 SUSPENSIONS – HETEROGENEOUS, HOMOGENEOUS OR DYE-SENSITIZED?" in 6th Conference of The Serbian Society for Ceramic Materials, Belgrade, Serbia, 28-29 June 2022 (2022),
https://hdl.handle.net/21.15107/rcub_rimsi_2526 .

TY  - CONF
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Stijepovic, Ivan
AU  - Vijatović Petrović, Mirjana
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2447
AB  - Various alternative renewable sources such as solar, wind, thermal energy and
mechanical vibrations are available for the energy generations. For the last decades,
energy harvesters based on piezoelectricity from mechanical vibration are explored
extensively for its functionality in energy technologies [1,2]. Flexible piezoelectric
energy harvesters (FPEHs) and energy storage system were fabricated by employing
solid state synthesized lead-free BZT (BaZr0.2Ti0.8O3) and PZT (PbZr0.52Ti0.48O3)
nanopowders prepared by autocombustion method with polyvinylidene fluoride
(PVDF) in different volume percentage (xBZT/PZT-(1-x)PVDF, x=30, 40, 50).
Both flexible films with quite homogeneous distribution of piezo-active filler were
confirmed by XRD and SEM analysis. In addition, the remnant polarization (Pr) and
dielectric constant are also investigated to evaluate the breakdown strength in
flexible films. The improved dielectric loss tangent (< 0.02) and dielectric
permittivity of 120 at room temperature and frequency 1 MHz of BZT-PVDF (50-
50) in comparison with neat PVDF films is found beneficial for both energy
harvesting and storage. Calculations of storage energies obtained for the investigated
materials revealed an increasing trend with increasing amount of active phase (BZT
and PZT). The maximum storage energy of 0.11 J/cm3 and 0.13 J/cm3, and energy
efficiency (η) of 72% and 39% was obtained for BZT-PVDF (50-50) and PZTPVDF
(40-60) films, respectively. Test of the force impact showing similar output
voltage of around 4 V for both, BZT and PZT flexible films.
PB  - The Serbian Society for Ceramic Materials
C3  - 6th Conference of The Serbian Society for Ceramic Materials
T1  - LEAD BASED (PZT) AND LEAD FREE (BZT) COMPOSITES FLEXIBLE FILMS AS LOW-ENERGY PIEZOELECTRIC HARVESTERS
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2447
ER  - 

@conference{
author = "Bobić, Jelena and Ilić, Nikola and Despotovic, Zeljko V. and Džunuzović, Adis and Grigalaitis, Robertas and Stijepovic, Ivan and Vijatović Petrović, Mirjana",
year = "2022",
abstract = "Various alternative renewable sources such as solar, wind, thermal energy and
mechanical vibrations are available for the energy generations. For the last decades,
energy harvesters based on piezoelectricity from mechanical vibration are explored
extensively for its functionality in energy technologies [1,2]. Flexible piezoelectric
energy harvesters (FPEHs) and energy storage system were fabricated by employing
solid state synthesized lead-free BZT (BaZr0.2Ti0.8O3) and PZT (PbZr0.52Ti0.48O3)
nanopowders prepared by autocombustion method with polyvinylidene fluoride
(PVDF) in different volume percentage (xBZT/PZT-(1-x)PVDF, x=30, 40, 50).
Both flexible films with quite homogeneous distribution of piezo-active filler were
confirmed by XRD and SEM analysis. In addition, the remnant polarization (Pr) and
dielectric constant are also investigated to evaluate the breakdown strength in
flexible films. The improved dielectric loss tangent (< 0.02) and dielectric
permittivity of 120 at room temperature and frequency 1 MHz of BZT-PVDF (50-
50) in comparison with neat PVDF films is found beneficial for both energy
harvesting and storage. Calculations of storage energies obtained for the investigated
materials revealed an increasing trend with increasing amount of active phase (BZT
and PZT). The maximum storage energy of 0.11 J/cm3 and 0.13 J/cm3, and energy
efficiency (η) of 72% and 39% was obtained for BZT-PVDF (50-50) and PZTPVDF
(40-60) films, respectively. Test of the force impact showing similar output
voltage of around 4 V for both, BZT and PZT flexible films.",
publisher = "The Serbian Society for Ceramic Materials",
journal = "6th Conference of The Serbian Society for Ceramic Materials",
title = "LEAD BASED (PZT) AND LEAD FREE (BZT) COMPOSITES FLEXIBLE FILMS AS LOW-ENERGY PIEZOELECTRIC HARVESTERS",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2447"
}

Bobić, J., Ilić, N., Despotovic, Z. V., Džunuzović, A., Grigalaitis, R., Stijepovic, I.,& Vijatović Petrović, M.. (2022). LEAD BASED (PZT) AND LEAD FREE (BZT) COMPOSITES FLEXIBLE FILMS AS LOW-ENERGY PIEZOELECTRIC HARVESTERS. in 6th Conference of The Serbian Society for Ceramic Materials
The Serbian Society for Ceramic Materials..
https://hdl.handle.net/21.15107/rcub_rimsi_2447

Bobić J, Ilić N, Despotovic ZV, Džunuzović A, Grigalaitis R, Stijepovic I, Vijatović Petrović M. LEAD BASED (PZT) AND LEAD FREE (BZT) COMPOSITES FLEXIBLE FILMS AS LOW-ENERGY PIEZOELECTRIC HARVESTERS. in 6th Conference of The Serbian Society for Ceramic Materials. 2022;.
https://hdl.handle.net/21.15107/rcub_rimsi_2447 .

Bobić, Jelena, Ilić, Nikola, Despotovic, Zeljko V., Džunuzović, Adis, Grigalaitis, Robertas, Stijepovic, Ivan, Vijatović Petrović, Mirjana, "LEAD BASED (PZT) AND LEAD FREE (BZT) COMPOSITES FLEXIBLE FILMS AS LOW-ENERGY PIEZOELECTRIC HARVESTERS" in 6th Conference of The Serbian Society for Ceramic Materials (2022),
https://hdl.handle.net/21.15107/rcub_rimsi_2447 .

TY  - JOUR
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Veerapandiyan, V.
AU  - Vijatović Petrović, Mirjana
AU  - Deluca, M.
AU  - Džunuzović, Adis
AU  - Vukmirović, J.
AU  - Ning, K.
AU  - Reichmann, K.
AU  - Tidrow, S.
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1521
AB  - The ferroelectric and magnetic properties of four-layered Aurivillius Bi5Ti3FeO15 (BFT) compounds via partial substitution of Bi3+ with Y3+ and Fe3+ with Co2+ (according to formula: Bi5-xYxTi3FeO15, x = 0.1, 0.2, 0.3; Bi5Ti3Fe1-yCoyO15, y = 0.1, 0.3, 0.5) were investigated. Polycrystalline ceramics of Co and Y substituted BFT were prepared by conventional solid-state reaction. Crystal structure and phase purity were confirmed via X-ray diffraction and Rietveld refinement. Raman spectral signatures indicate that Y replaces Bi ions in the pseudo-perovskite layers and Co replaces Fe ions in the octahedral sites. SEM micrographs show a decrease in grain size for both chemically modified samples when compared to plate-like morphology for unmodified BFT with dimensions ranging from 3 to 5 μm in length and a thickness of ∼0.5 μm. The decrease in grain size is more pronounced in Co substituted samples with plate-like grain dimensions of 1 μm in length and 0.2 μm in thickness. Ferroelectric measurements show unsaturated leaky hysteresis loops in both chemically modified samples until the maximal applied electric field. Magnetic measurements confirm the paramagnetic nature of unmodified and Y substituted BFT ceramics while Co substituted BFT ceramics exhibit a typical ferromagnetic M-H loop. The largest remanent magnetization value of 0.084 emu/g at room temperature is recorded for the Co2+ substituted sample with x = 0.3.
PB  - Elsevier Masson s.r.l.
T2  - Solid State Sciences
T1  - Tailoring the ferroelectric and magnetic properties of Bi5Ti3FeO15 ceramics by doping with Co and Y
VL  - 123
DO  - 10.1016/j.solidstatesciences.2021.106802
ER  - 

@article{
author = "Bobić, Jelena and Ilić, Nikola and Veerapandiyan, V. and Vijatović Petrović, Mirjana and Deluca, M. and Džunuzović, Adis and Vukmirović, J. and Ning, K. and Reichmann, K. and Tidrow, S.",
year = "2022",
abstract = "The ferroelectric and magnetic properties of four-layered Aurivillius Bi5Ti3FeO15 (BFT) compounds via partial substitution of Bi3+ with Y3+ and Fe3+ with Co2+ (according to formula: Bi5-xYxTi3FeO15, x = 0.1, 0.2, 0.3; Bi5Ti3Fe1-yCoyO15, y = 0.1, 0.3, 0.5) were investigated. Polycrystalline ceramics of Co and Y substituted BFT were prepared by conventional solid-state reaction. Crystal structure and phase purity were confirmed via X-ray diffraction and Rietveld refinement. Raman spectral signatures indicate that Y replaces Bi ions in the pseudo-perovskite layers and Co replaces Fe ions in the octahedral sites. SEM micrographs show a decrease in grain size for both chemically modified samples when compared to plate-like morphology for unmodified BFT with dimensions ranging from 3 to 5 μm in length and a thickness of ∼0.5 μm. The decrease in grain size is more pronounced in Co substituted samples with plate-like grain dimensions of 1 μm in length and 0.2 μm in thickness. Ferroelectric measurements show unsaturated leaky hysteresis loops in both chemically modified samples until the maximal applied electric field. Magnetic measurements confirm the paramagnetic nature of unmodified and Y substituted BFT ceramics while Co substituted BFT ceramics exhibit a typical ferromagnetic M-H loop. The largest remanent magnetization value of 0.084 emu/g at room temperature is recorded for the Co2+ substituted sample with x = 0.3.",
publisher = "Elsevier Masson s.r.l.",
journal = "Solid State Sciences",
title = "Tailoring the ferroelectric and magnetic properties of Bi5Ti3FeO15 ceramics by doping with Co and Y",
volume = "123",
doi = "10.1016/j.solidstatesciences.2021.106802"
}

Bobić, J., Ilić, N., Veerapandiyan, V., Vijatović Petrović, M., Deluca, M., Džunuzović, A., Vukmirović, J., Ning, K., Reichmann, K.,& Tidrow, S.. (2022). Tailoring the ferroelectric and magnetic properties of Bi5Ti3FeO15 ceramics by doping with Co and Y. in Solid State Sciences
Elsevier Masson s.r.l.., 123.
https://doi.org/10.1016/j.solidstatesciences.2021.106802

Bobić J, Ilić N, Veerapandiyan V, Vijatović Petrović M, Deluca M, Džunuzović A, Vukmirović J, Ning K, Reichmann K, Tidrow S. Tailoring the ferroelectric and magnetic properties of Bi5Ti3FeO15 ceramics by doping with Co and Y. in Solid State Sciences. 2022;123.
doi:10.1016/j.solidstatesciences.2021.106802 .

Bobić, Jelena, Ilić, Nikola, Veerapandiyan, V., Vijatović Petrović, Mirjana, Deluca, M., Džunuzović, Adis, Vukmirović, J., Ning, K., Reichmann, K., Tidrow, S., "Tailoring the ferroelectric and magnetic properties of Bi5Ti3FeO15 ceramics by doping with Co and Y" in Solid State Sciences, 123 (2022),
https://doi.org/10.1016/j.solidstatesciences.2021.106802 . .

TY  - JOUR
AU  - Ilić, Nikola
AU  - Teixeira, G.F.
AU  - Bobić, Jelena
AU  - Spasojević, Vojislav
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Zaghete, M.A.
AU  - Stojanović, Biljana D
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1519
AB  - Bismuth ferrite (BiFeO3) powders were synthesized by auto-combustion method using glycine as a fuel. Doping ions of different valence were used to study the influence on electrical conductivity and ferroelectric properties. Powders were mixed and hot-pressed with α-PVDF to form flexible composite samples. Composites endured significantly higher electrical fields with lower leakage and retained the weak ferromagnetism present in powders. Dielectric properties were improved by doping with Zr4+, Y3+ and Ca2+ as well as the electrical resistivity. Flexible composites exhibited improved electrical resistivity and modified conduction mechanism. Relatively high magnetization of powders completely originates from magnetite particles formed during the combustion, while sintered samples exhibited typical antiferromagnetic behaviour.
PB  - Elsevier Ltd
T2  - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
T1  - Auto-combustion synthesis as a method for preparing BiFeO3 powders and flexible BiFeO3/PVDF films with improved magnetic properties. Influence of doping ion position, size and valence on electric properties
VL  - 280
DO  - 10.1016/j.mseb.2022.115686
ER  - 

@article{
author = "Ilić, Nikola and Teixeira, G.F. and Bobić, Jelena and Spasojević, Vojislav and Džunuzović, Adis and Vijatović Petrović, Mirjana and Zaghete, M.A. and Stojanović, Biljana D",
year = "2022",
abstract = "Bismuth ferrite (BiFeO3) powders were synthesized by auto-combustion method using glycine as a fuel. Doping ions of different valence were used to study the influence on electrical conductivity and ferroelectric properties. Powders were mixed and hot-pressed with α-PVDF to form flexible composite samples. Composites endured significantly higher electrical fields with lower leakage and retained the weak ferromagnetism present in powders. Dielectric properties were improved by doping with Zr4+, Y3+ and Ca2+ as well as the electrical resistivity. Flexible composites exhibited improved electrical resistivity and modified conduction mechanism. Relatively high magnetization of powders completely originates from magnetite particles formed during the combustion, while sintered samples exhibited typical antiferromagnetic behaviour.",
publisher = "Elsevier Ltd",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
title = "Auto-combustion synthesis as a method for preparing BiFeO3 powders and flexible BiFeO3/PVDF films with improved magnetic properties. Influence of doping ion position, size and valence on electric properties",
volume = "280",
doi = "10.1016/j.mseb.2022.115686"
}

Ilić, N., Teixeira, G.F., Bobić, J., Spasojević, V., Džunuzović, A., Vijatović Petrović, M., Zaghete, M.A.,& Stojanović, B. D.. (2022). Auto-combustion synthesis as a method for preparing BiFeO3 powders and flexible BiFeO3/PVDF films with improved magnetic properties. Influence of doping ion position, size and valence on electric properties. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Elsevier Ltd., 280.
https://doi.org/10.1016/j.mseb.2022.115686

Ilić N, Teixeira G, Bobić J, Spasojević V, Džunuzović A, Vijatović Petrović M, Zaghete M, Stojanović BD. Auto-combustion synthesis as a method for preparing BiFeO3 powders and flexible BiFeO3/PVDF films with improved magnetic properties. Influence of doping ion position, size and valence on electric properties. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2022;280.
doi:10.1016/j.mseb.2022.115686 .

Ilić, Nikola, Teixeira, G.F., Bobić, Jelena, Spasojević, Vojislav, Džunuzović, Adis, Vijatović Petrović, Mirjana, Zaghete, M.A., Stojanović, Biljana D, "Auto-combustion synthesis as a method for preparing BiFeO3 powders and flexible BiFeO3/PVDF films with improved magnetic properties. Influence of doping ion position, size and valence on electric properties" in Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 280 (2022),
https://doi.org/10.1016/j.mseb.2022.115686 . .

TY  - JOUR
AU  - Bajac, Branimir
AU  - Vukmirovic, Jelena
AU  - Samardzic, Natasa
AU  - Banys, Juras
AU  - Stojanović, Goran
AU  - Bobić, Jelena
AU  - Srdić, Vladimir
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2202
AB  - In this work different lead-free multilayered structures, composed of perovskite BaTiO3 and spinel NiFe2O4 thin layers, were obtained by solution deposition method. Structural characterization of the sintered thin films confirmed the well-defined layered structure with overall thickness from 160 to 600 nm, crystalline nature of perovskite BaTiO3 and spinel NiFe2O4 phases without secondary phases (after sintering below 900 °C) and grains on nanometer scale. Dielectric properties of the multiferroic multilayer BaTiO3/NiFe2O4 thin films were analyzed in temperature and frequency range from 30 °C to 200 °C and 100 Hz to 1 MHz, respectively. In comparison to the pure BaTiO3 films, the introduction of ferrite layer reduces dielectric response and increases low frequency permittivity dispersion of the multilayer thin films. The multilayer samples have shown relatively low dielectric loss with stronger contribution of conductivity at higher temperatures, and characteristic broad peak representing “relaxation” of the interface charge accumulation.
PB  - Elsevier
T2  - Ceramics International
T1  - Dielectric and ferroelectric properties of multilayer BaTiO3/NiFe2O4 thin films prepared by solution deposition technique
EP  - 26386
IS  - 18
SP  - 26378
VL  - 48
DO  - 10.1016/j.ceramint.2022.05.326
ER  - 

@article{
author = "Bajac, Branimir and Vukmirovic, Jelena and Samardzic, Natasa and Banys, Juras and Stojanović, Goran and Bobić, Jelena and Srdić, Vladimir",
year = "2022",
abstract = "In this work different lead-free multilayered structures, composed of perovskite BaTiO3 and spinel NiFe2O4 thin layers, were obtained by solution deposition method. Structural characterization of the sintered thin films confirmed the well-defined layered structure with overall thickness from 160 to 600 nm, crystalline nature of perovskite BaTiO3 and spinel NiFe2O4 phases without secondary phases (after sintering below 900 °C) and grains on nanometer scale. Dielectric properties of the multiferroic multilayer BaTiO3/NiFe2O4 thin films were analyzed in temperature and frequency range from 30 °C to 200 °C and 100 Hz to 1 MHz, respectively. In comparison to the pure BaTiO3 films, the introduction of ferrite layer reduces dielectric response and increases low frequency permittivity dispersion of the multilayer thin films. The multilayer samples have shown relatively low dielectric loss with stronger contribution of conductivity at higher temperatures, and characteristic broad peak representing “relaxation” of the interface charge accumulation.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Dielectric and ferroelectric properties of multilayer BaTiO3/NiFe2O4 thin films prepared by solution deposition technique",
pages = "26386-26378",
number = "18",
volume = "48",
doi = "10.1016/j.ceramint.2022.05.326"
}

Bajac, B., Vukmirovic, J., Samardzic, N., Banys, J., Stojanović, G., Bobić, J.,& Srdić, V.. (2022). Dielectric and ferroelectric properties of multilayer BaTiO3/NiFe2O4 thin films prepared by solution deposition technique. in Ceramics International
Elsevier., 48(18), 26378-26386.
https://doi.org/10.1016/j.ceramint.2022.05.326

Bajac B, Vukmirovic J, Samardzic N, Banys J, Stojanović G, Bobić J, Srdić V. Dielectric and ferroelectric properties of multilayer BaTiO3/NiFe2O4 thin films prepared by solution deposition technique. in Ceramics International. 2022;48(18):26378-26386.
doi:10.1016/j.ceramint.2022.05.326 .

Bajac, Branimir, Vukmirovic, Jelena, Samardzic, Natasa, Banys, Juras, Stojanović, Goran, Bobić, Jelena, Srdić, Vladimir, "Dielectric and ferroelectric properties of multilayer BaTiO3/NiFe2O4 thin films prepared by solution deposition technique" in Ceramics International, 48, no. 18 (2022):26378-26386,
https://doi.org/10.1016/j.ceramint.2022.05.326 . .

TY  - CONF
AU  - Vijatović Petrović, Mirjana
AU  - Craciun, Floriana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Galassi, Carmen
AU  - Ilić, Nikola
AU  - Brunengo, Elisabetta
AU  - Despotovic, Zeljko V.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Stagnaro, Paola
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2472
AB  - The important task of scientific community nowadays is finding the way to use enormous
amount of mechanical energy released everywhere around us as a renewable and safe energy
source.
This research was focused on the preparation of flexible composite films, by combining a
highly flexible polyvinylidene fluoride (PVDF) polymer matrix with lead-free piezoelectric
perovskites, 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (NBT-BT), in different ratios, using the hot
pressing method. A crucial point of this investigation is to show that this material is quite
versatile and possesses functional properties which are sensitive to both microscopic and
chemical modifications.
Detailed investigation of processed flexible films led to the main conclusion that
electrical properties of these composites can be affected by different factors. Firstly, the hotpressing
method itself induces the formation of electroactive β-phase of PVDF polymer, the
NBT-BT as filler with negatively charged surface enables a predominant formation of desirable
piezoelectric PVDF phase as well and additionally, there is an influence of concentration and
type (pre-preparation method) of the added filler.
Dielectric permittivity values of composites were up to 110 and highly depend on the
filler amount. A very useful zone around room temperature as a plateau with relatively constant
dielectric permittivity and losses was noticed in each film`s dielectric spectra. Anelastic
measurements have shown a complete agreement with dielectric properties in which the
temperature dependence of the Young’s modulus and the losses are dominated by those of the
polymer.
Regarding the resulting dielectric and ferroeletric properties of the flexible composites,
the potential of these materials for the energy storage application was investigated. Energy
density efficiencies obtained for investigated materials have shown a decreasing trend with
increasing amount of filler with values of 66-74 %.
Assembled energy harvesting units were made by proper wiring and covering the flexible
film with Kapton protection layer. The obtained output voltage while applying the impact force
was from 1 V to 7 V, depending on the type of the flexible film.
The main conclusion derived from this study is that composite flexible films made of
lead-free NBT-BT filler and PVDF, have high potential to be used for environmentally safe lowenergy
storage and energy harvesting devices.
PB  - IEEE ISAF-ISIF-PFM 2021, Sydney, Australia
C3  - IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.
T1  - Composite flexible films prepared by hot pressing for low-energy harvesting and storage
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2472
ER  - 

@conference{
author = "Vijatović Petrović, Mirjana and Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Galassi, Carmen and Ilić, Nikola and Brunengo, Elisabetta and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Stagnaro, Paola",
year = "2021",
abstract = "The important task of scientific community nowadays is finding the way to use enormous
amount of mechanical energy released everywhere around us as a renewable and safe energy
source.
This research was focused on the preparation of flexible composite films, by combining a
highly flexible polyvinylidene fluoride (PVDF) polymer matrix with lead-free piezoelectric
perovskites, 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (NBT-BT), in different ratios, using the hot
pressing method. A crucial point of this investigation is to show that this material is quite
versatile and possesses functional properties which are sensitive to both microscopic and
chemical modifications.
Detailed investigation of processed flexible films led to the main conclusion that
electrical properties of these composites can be affected by different factors. Firstly, the hotpressing
method itself induces the formation of electroactive β-phase of PVDF polymer, the
NBT-BT as filler with negatively charged surface enables a predominant formation of desirable
piezoelectric PVDF phase as well and additionally, there is an influence of concentration and
type (pre-preparation method) of the added filler.
Dielectric permittivity values of composites were up to 110 and highly depend on the
filler amount. A very useful zone around room temperature as a plateau with relatively constant
dielectric permittivity and losses was noticed in each film`s dielectric spectra. Anelastic
measurements have shown a complete agreement with dielectric properties in which the
temperature dependence of the Young’s modulus and the losses are dominated by those of the
polymer.
Regarding the resulting dielectric and ferroeletric properties of the flexible composites,
the potential of these materials for the energy storage application was investigated. Energy
density efficiencies obtained for investigated materials have shown a decreasing trend with
increasing amount of filler with values of 66-74 %.
Assembled energy harvesting units were made by proper wiring and covering the flexible
film with Kapton protection layer. The obtained output voltage while applying the impact force
was from 1 V to 7 V, depending on the type of the flexible film.
The main conclusion derived from this study is that composite flexible films made of
lead-free NBT-BT filler and PVDF, have high potential to be used for environmentally safe lowenergy
storage and energy harvesting devices.",
publisher = "IEEE ISAF-ISIF-PFM 2021, Sydney, Australia",
journal = "IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.",
title = "Composite flexible films prepared by hot pressing for low-energy harvesting and storage",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2472"
}

Vijatović Petrović, M., Craciun, F., Cordero, F., MERCADELLI, E., Galassi, C., Ilić, N., Brunengo, E., Despotovic, Z. V., Bobić, J., Džunuzović, A.,& Stagnaro, P.. (2021). Composite flexible films prepared by hot pressing for low-energy harvesting and storage. in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.
IEEE ISAF-ISIF-PFM 2021, Sydney, Australia..
https://hdl.handle.net/21.15107/rcub_rimsi_2472

Vijatović Petrović M, Craciun F, Cordero F, MERCADELLI E, Galassi C, Ilić N, Brunengo E, Despotovic ZV, Bobić J, Džunuzović A, Stagnaro P. Composite flexible films prepared by hot pressing for low-energy harvesting and storage. in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_2472 .

Vijatović Petrović, Mirjana, Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Galassi, Carmen, Ilić, Nikola, Brunengo, Elisabetta, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Stagnaro, Paola, "Composite flexible films prepared by hot pressing for low-energy harvesting and storage" in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021. (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_2472 .

TY  - CONF
AU  - Ilić, Nikola
AU  - Vijatović Petrović, Mirjana
AU  - Despotovic, Zeljko V.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Ferreira Teixeira, Guilhermina
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2457
AB  - Bismuth ferrite (BiFeO3) powders were synthesized by sol-gel methods and incorporated into flexible composites by hot pressing with polyvinylidene fluoride (α-PVDF). Several metal ions with various valances were used to dope BiFeO3 in order to examine their influence on electrical properties. XRD characterization confirmed that almost all of the dopants incorporated very well into the perovskite structure. Microstructural study showed that the composites are homogeneous with thickness of 50 to 140 μm. Dielectric, impedance and ferroelectric properties of composite samples showed that all of the dopants even those with smaller valence than the ions they substitute enhance the capability to handle the electric field. α-PVDF matrix also helped in preventing electrical breakdown comparing to BiFeO3 ceramics, which is usually susceptible to high leakage. Flexible composites were subjected to impact piezoelectric test with the idea to study their potential to collect mechanical energy from the surrounding vibrations.
PB  - Faculty of Technology, University of Novi Sad
C3  - 14th ECerS Conference for Young Scientists in Ceramics, CYSC-2021 Novi Sad, Serbia, October 20-23, 2021
T1  - MECHANICAL ENERGY HARVESTING POTENTIAL OF BiFeO3-PVDF FLEXIBLE COMPOSITES
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2457
ER  - 

@conference{
author = "Ilić, Nikola and Vijatović Petrović, Mirjana and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Ferreira Teixeira, Guilhermina",
year = "2021",
abstract = "Bismuth ferrite (BiFeO3) powders were synthesized by sol-gel methods and incorporated into flexible composites by hot pressing with polyvinylidene fluoride (α-PVDF). Several metal ions with various valances were used to dope BiFeO3 in order to examine their influence on electrical properties. XRD characterization confirmed that almost all of the dopants incorporated very well into the perovskite structure. Microstructural study showed that the composites are homogeneous with thickness of 50 to 140 μm. Dielectric, impedance and ferroelectric properties of composite samples showed that all of the dopants even those with smaller valence than the ions they substitute enhance the capability to handle the electric field. α-PVDF matrix also helped in preventing electrical breakdown comparing to BiFeO3 ceramics, which is usually susceptible to high leakage. Flexible composites were subjected to impact piezoelectric test with the idea to study their potential to collect mechanical energy from the surrounding vibrations.",
publisher = "Faculty of Technology, University of Novi Sad",
journal = "14th ECerS Conference for Young Scientists in Ceramics, CYSC-2021 Novi Sad, Serbia, October 20-23, 2021",
title = "MECHANICAL ENERGY HARVESTING POTENTIAL OF BiFeO3-PVDF FLEXIBLE COMPOSITES",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2457"
}

Ilić, N., Vijatović Petrović, M., Despotovic, Z. V., Bobić, J., Džunuzović, A.,& Ferreira Teixeira, G.. (2021). MECHANICAL ENERGY HARVESTING POTENTIAL OF BiFeO3-PVDF FLEXIBLE COMPOSITES. in 14th ECerS Conference for Young Scientists in Ceramics, CYSC-2021 Novi Sad, Serbia, October 20-23, 2021
Faculty of Technology, University of Novi Sad..
https://hdl.handle.net/21.15107/rcub_rimsi_2457

Ilić N, Vijatović Petrović M, Despotovic ZV, Bobić J, Džunuzović A, Ferreira Teixeira G. MECHANICAL ENERGY HARVESTING POTENTIAL OF BiFeO3-PVDF FLEXIBLE COMPOSITES. in 14th ECerS Conference for Young Scientists in Ceramics, CYSC-2021 Novi Sad, Serbia, October 20-23, 2021. 2021;.
https://hdl.handle.net/21.15107/rcub_rimsi_2457 .

Ilić, Nikola, Vijatović Petrović, Mirjana, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Ferreira Teixeira, Guilhermina, "MECHANICAL ENERGY HARVESTING POTENTIAL OF BiFeO3-PVDF FLEXIBLE COMPOSITES" in 14th ECerS Conference for Young Scientists in Ceramics, CYSC-2021 Novi Sad, Serbia, October 20-23, 2021 (2021),
https://hdl.handle.net/21.15107/rcub_rimsi_2457 .

TY  - JOUR
AU  - Vijatović Petrović, Mirjana
AU  - Cordero, F.
AU  - Mercadelli, E.
AU  - Brunengo, E.
AU  - Ilić, Nikola
AU  - Galassi, C.
AU  - Despotović, Z.
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - Stagnaro, P.
AU  - Canu, G.
AU  - Craciun, F.
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1465
AB  - The idea of this work is finding the way to efficiently and safely use mechanical energy released in small quantities around us to power up small-scale electronic devices used in everyday life. To this purpose, flexible lead-free piezoelectric composite films were prepared by hot pressing. Different amounts (30, 35 and 40 vol%) of lead-free piezoelectric material bismuth sodium titanate-barium titanate were embedded in the matrix of polyvinylidene fluoride under carefully optimized conditions of temperature and pressure, obtaining flexible films with quite homogeneous distribution of piezo-active filler. ATR-FTIR analysis revealed that hot pressing the flexible films caused a transformation of electro-inactive PVDF alpha-phase into electro-active beta and gamma phases. Dielectric measurements showed an increase of the permittivity up to 80 with the active phase increasing. Anelastic measurements showed that the elastic modulus increases as well with the fraction of active ceramic phase. Lastly, obtained flexible polymer-composites demonstrated notable properties both for energy storage and energy harvesting application, showing up to 74% of energy storage efficiency and, from testing of the force impact, up to 9 V and similar to 80 mu W of output voltage and power.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage
VL  - 884
DO  - 10.1016/j.jallcom.2021.161071
ER  - 

@article{
author = "Vijatović Petrović, Mirjana and Cordero, F. and Mercadelli, E. and Brunengo, E. and Ilić, Nikola and Galassi, C. and Despotović, Z. and Bobić, Jelena and Džunuzović, Adis and Stagnaro, P. and Canu, G. and Craciun, F.",
year = "2021",
abstract = "The idea of this work is finding the way to efficiently and safely use mechanical energy released in small quantities around us to power up small-scale electronic devices used in everyday life. To this purpose, flexible lead-free piezoelectric composite films were prepared by hot pressing. Different amounts (30, 35 and 40 vol%) of lead-free piezoelectric material bismuth sodium titanate-barium titanate were embedded in the matrix of polyvinylidene fluoride under carefully optimized conditions of temperature and pressure, obtaining flexible films with quite homogeneous distribution of piezo-active filler. ATR-FTIR analysis revealed that hot pressing the flexible films caused a transformation of electro-inactive PVDF alpha-phase into electro-active beta and gamma phases. Dielectric measurements showed an increase of the permittivity up to 80 with the active phase increasing. Anelastic measurements showed that the elastic modulus increases as well with the fraction of active ceramic phase. Lastly, obtained flexible polymer-composites demonstrated notable properties both for energy storage and energy harvesting application, showing up to 74% of energy storage efficiency and, from testing of the force impact, up to 9 V and similar to 80 mu W of output voltage and power.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage",
volume = "884",
doi = "10.1016/j.jallcom.2021.161071"
}

Vijatović Petrović, M., Cordero, F., Mercadelli, E., Brunengo, E., Ilić, N., Galassi, C., Despotović, Z., Bobić, J., Džunuzović, A., Stagnaro, P., Canu, G.,& Craciun, F.. (2021). Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 884.
https://doi.org/10.1016/j.jallcom.2021.161071

Vijatović Petrović M, Cordero F, Mercadelli E, Brunengo E, Ilić N, Galassi C, Despotović Z, Bobić J, Džunuzović A, Stagnaro P, Canu G, Craciun F. Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage. in Journal of Alloys and Compounds. 2021;884.
doi:10.1016/j.jallcom.2021.161071 .

Vijatović Petrović, Mirjana, Cordero, F., Mercadelli, E., Brunengo, E., Ilić, Nikola, Galassi, C., Despotović, Z., Bobić, Jelena, Džunuzović, Adis, Stagnaro, P., Canu, G., Craciun, F., "Flexible lead-free NBT-BT/PVDF composite films by hot pressing for low-energy harvesting and storage" in Journal of Alloys and Compounds, 884 (2021),
https://doi.org/10.1016/j.jallcom.2021.161071 . .

TY  - JOUR
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Stojanović, Biljana D
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1462
AB  - Multiferroic composites with general formula Ba(Ti0.95Zr0.05)O-3 - Ni0.7Zn0.3Fe2O4, Ba(Ti0.95Zr0.05)O-3 - CoFe2O4, Ba(Ti0.95Zr0.05)O-3 - Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4, (BTZr(95-5) - NZF, BTZr(95-5) - CF, BTZr(95-5) - NCuSmZF) were prepared by mixing chemically obtained different types of ferrites and BTZ(95-5) powders in the planetary mill for 24 h. The optimization of sintering process was performed and powders were pressed and sintered at 1300 degrees C for obtained composites samples. From the X-ray analysis for single phase and composites ceramics the formation of crystallized structure of ferrites and barium zirconium titanate can be noticed. SEM analyses indicated the formation of two types nanosized grains, polygonal ferromagnetic and rounded ferroelectric grains. The electrical properties of these materials were investigated using impedance spectroscopy and analysis of ferroelectric measurements. Impedance analysis of all investigated samples has shown different relaxation processes that originated from the grain and grain boundary contributions. The results of polarization vs. electric field measurements have shown the influence of magnetic phase type and its concentration on the ferroelectric properties of the composites. Due to high conductivity of ferrite phases and presence of interfacial polarization, the shapes of these curves differed from the conventional ferroelectric materials.
PB  - Springer, Dordrecht
T2  - Journal of Electroceramics
T1  - Influence of ferrite phase on electrical properties of the barium zirconium titanate based multiferroic composites
IS  - 2
VL  - 46
DO  - 10.1007/s10832-021-00244-9
ER  - 

@article{
author = "Džunuzović, Adis and Vijatović Petrović, Mirjana and Bobić, Jelena and Ilić, Nikola and Stojanović, Biljana D",
year = "2021",
abstract = "Multiferroic composites with general formula Ba(Ti0.95Zr0.05)O-3 - Ni0.7Zn0.3Fe2O4, Ba(Ti0.95Zr0.05)O-3 - CoFe2O4, Ba(Ti0.95Zr0.05)O-3 - Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4, (BTZr(95-5) - NZF, BTZr(95-5) - CF, BTZr(95-5) - NCuSmZF) were prepared by mixing chemically obtained different types of ferrites and BTZ(95-5) powders in the planetary mill for 24 h. The optimization of sintering process was performed and powders were pressed and sintered at 1300 degrees C for obtained composites samples. From the X-ray analysis for single phase and composites ceramics the formation of crystallized structure of ferrites and barium zirconium titanate can be noticed. SEM analyses indicated the formation of two types nanosized grains, polygonal ferromagnetic and rounded ferroelectric grains. The electrical properties of these materials were investigated using impedance spectroscopy and analysis of ferroelectric measurements. Impedance analysis of all investigated samples has shown different relaxation processes that originated from the grain and grain boundary contributions. The results of polarization vs. electric field measurements have shown the influence of magnetic phase type and its concentration on the ferroelectric properties of the composites. Due to high conductivity of ferrite phases and presence of interfacial polarization, the shapes of these curves differed from the conventional ferroelectric materials.",
publisher = "Springer, Dordrecht",
journal = "Journal of Electroceramics",
title = "Influence of ferrite phase on electrical properties of the barium zirconium titanate based multiferroic composites",
number = "2",
volume = "46",
doi = "10.1007/s10832-021-00244-9"
}

Džunuzović, A., Vijatović Petrović, M., Bobić, J., Ilić, N.,& Stojanović, B. D.. (2021). Influence of ferrite phase on electrical properties of the barium zirconium titanate based multiferroic composites. in Journal of Electroceramics
Springer, Dordrecht., 46(2).
https://doi.org/10.1007/s10832-021-00244-9

Džunuzović A, Vijatović Petrović M, Bobić J, Ilić N, Stojanović BD. Influence of ferrite phase on electrical properties of the barium zirconium titanate based multiferroic composites. in Journal of Electroceramics. 2021;46(2).
doi:10.1007/s10832-021-00244-9 .

Džunuzović, Adis, Vijatović Petrović, Mirjana, Bobić, Jelena, Ilić, Nikola, Stojanović, Biljana D, "Influence of ferrite phase on electrical properties of the barium zirconium titanate based multiferroic composites" in Journal of Electroceramics, 46, no. 2 (2021),
https://doi.org/10.1007/s10832-021-00244-9 . .

TY  - JOUR
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Stojanović, Biljana D
PY  - 2021
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1413
AB  - Multiferroic composites containing ferroelectric Ba(Ti0.80Zr0.20)O-3 (BT80Zr20) phase and magnetic Ni0.7Zn0.3Fe2O4 (NZF), CoFe2O4 (CF) or Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4 (NCuSmZF) phase were investigated in this study. Three composites, BT80Zr20-NZF, BT80Zr20-CF and BT80Zr20-NCuSmZF were prepared by mixing chemically synthesized powders in the planetary mill, uniaxial pressing and sintering at 1300 degrees C. X-ray diffraction data for the single phase and composites ceramics indicated the formation of crystallized structure of both ferrites and barium zirconium titanate, without the presence of undesirable phases. Microstructure analysis has shown the formation of two types of nanosized grains, polygonal ferromagnetic and rounded ferroelectric grains. Non-saturated hysteresis loops were evident in all composite samples possibly due to the presence of very high conductive ferrite phases. The BT80Zr20-CF has shown the lowest conductivity values in comparison with other two compounds and therefore the highest potential for ferroelectric application. The impedance investigations confirmed the presence of different relaxation processes that originate from the grain and grain boundary contributions. Investigation of J-E relation between leakage and electric field for the BT80Zr20 and composites revealed the presence of four possible mechanisms of conduction in these materials.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds
EP  - 269
IS  - 3
SP  - 256
VL  - 15
DO  - 10.2298/PAC2103256D
ER  - 

@article{
author = "Džunuzović, Adis and Vijatović Petrović, Mirjana and Bobić, Jelena and Ilić, Nikola and Stojanović, Biljana D",
year = "2021",
abstract = "Multiferroic composites containing ferroelectric Ba(Ti0.80Zr0.20)O-3 (BT80Zr20) phase and magnetic Ni0.7Zn0.3Fe2O4 (NZF), CoFe2O4 (CF) or Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4 (NCuSmZF) phase were investigated in this study. Three composites, BT80Zr20-NZF, BT80Zr20-CF and BT80Zr20-NCuSmZF were prepared by mixing chemically synthesized powders in the planetary mill, uniaxial pressing and sintering at 1300 degrees C. X-ray diffraction data for the single phase and composites ceramics indicated the formation of crystallized structure of both ferrites and barium zirconium titanate, without the presence of undesirable phases. Microstructure analysis has shown the formation of two types of nanosized grains, polygonal ferromagnetic and rounded ferroelectric grains. Non-saturated hysteresis loops were evident in all composite samples possibly due to the presence of very high conductive ferrite phases. The BT80Zr20-CF has shown the lowest conductivity values in comparison with other two compounds and therefore the highest potential for ferroelectric application. The impedance investigations confirmed the presence of different relaxation processes that originate from the grain and grain boundary contributions. Investigation of J-E relation between leakage and electric field for the BT80Zr20 and composites revealed the presence of four possible mechanisms of conduction in these materials.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds",
pages = "269-256",
number = "3",
volume = "15",
doi = "10.2298/PAC2103256D"
}

Džunuzović, A., Vijatović Petrović, M., Bobić, J., Ilić, N.,& Stojanović, B. D.. (2021). Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 15(3), 256-269.
https://doi.org/10.2298/PAC2103256D

Džunuzović A, Vijatović Petrović M, Bobić J, Ilić N, Stojanović BD. Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds. in Processing and Application of Ceramics. 2021;15(3):256-269.
doi:10.2298/PAC2103256D .

Džunuzović, Adis, Vijatović Petrović, Mirjana, Bobić, Jelena, Ilić, Nikola, Stojanović, Biljana D, "Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds" in Processing and Application of Ceramics, 15, no. 3 (2021):256-269,
https://doi.org/10.2298/PAC2103256D . .

TY  - CONF
AU  - Ilić, Nikola
AU  - Bobić, Jelena
AU  - Vijatović Petrović, Mirjana
AU  - Džunuzović, Adis
AU  - Stojanović, Biljana
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2509
AB  - Bismuth ferrite (BiFeO3) is studied a lot in recent years because of its specific structure and potential to act
as single phase multiferrioic well above the room temperature. Thanks to the optical band gap energy of 2.3-
2.8 eV BiFeO3 is also an interesting material for photocatalytic and solar energy applications. Sol-gel and solid
state methods were used to synthesize BiFeO3-based powders. Two main methods would be used to modify the
band gap. First one is incorporation into composite materials with contribution of phase boundaries formed
between different phases of bismuth-iron oxides or BiFeO3 and silica-based substrate powders. Second one is
modification of powders by milling them with organic compounds in order to get defects and oxygen vacancies.
Composition, structure and microstructure of such way obtained powders were conducted and their influence
on variations in band-gap energy studied. Visible and UV-Vis light photocatalytic activity of synthesized materials
for decomposition of methylene blue solutions was tested and optimal composition and preparation route
for this application proposed, as well as the present mechanisms of adsorption and photocatalytic reaction.
PB  - Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
C3  - Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
T1  - Band-gap engineering of BiFeO3 based powders. Influence on photocatalytic properties
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2509
ER  - 

@conference{
author = "Ilić, Nikola and Bobić, Jelena and Vijatović Petrović, Mirjana and Džunuzović, Adis and Stojanović, Biljana",
year = "2020",
abstract = "Bismuth ferrite (BiFeO3) is studied a lot in recent years because of its specific structure and potential to act
as single phase multiferrioic well above the room temperature. Thanks to the optical band gap energy of 2.3-
2.8 eV BiFeO3 is also an interesting material for photocatalytic and solar energy applications. Sol-gel and solid
state methods were used to synthesize BiFeO3-based powders. Two main methods would be used to modify the
band gap. First one is incorporation into composite materials with contribution of phase boundaries formed
between different phases of bismuth-iron oxides or BiFeO3 and silica-based substrate powders. Second one is
modification of powders by milling them with organic compounds in order to get defects and oxygen vacancies.
Composition, structure and microstructure of such way obtained powders were conducted and their influence
on variations in band-gap energy studied. Visible and UV-Vis light photocatalytic activity of synthesized materials
for decomposition of methylene blue solutions was tested and optimal composition and preparation route
for this application proposed, as well as the present mechanisms of adsorption and photocatalytic reaction.",
publisher = "Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference",
journal = "Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference",
title = "Band-gap engineering of BiFeO3 based powders. Influence on photocatalytic properties",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2509"
}

Ilić, N., Bobić, J., Vijatović Petrović, M., Džunuzović, A.,& Stojanović, B.. (2020). Band-gap engineering of BiFeO3 based powders. Influence on photocatalytic properties. in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference..
https://hdl.handle.net/21.15107/rcub_rimsi_2509

Ilić N, Bobić J, Vijatović Petrović M, Džunuzović A, Stojanović B. Band-gap engineering of BiFeO3 based powders. Influence on photocatalytic properties. in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference. 2020;.
https://hdl.handle.net/21.15107/rcub_rimsi_2509 .

Ilić, Nikola, Bobić, Jelena, Vijatović Petrović, Mirjana, Džunuzović, Adis, Stojanović, Biljana, "Band-gap engineering of BiFeO3 based powders. Influence on photocatalytic properties" in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference (2020),
https://hdl.handle.net/21.15107/rcub_rimsi_2509 .

TY  - CONF
AU  - Vijatović Petrović, Mirjana
AU  - Rusanescu Craciun, Floriana
AU  - Cordero, Francesco
AU  - MERCADELLI, ELISA
AU  - Galassi, Carmen
AU  - Ilić, Nikola
AU  - Bobić, Jelena
AU  - Brunengo, Elisabetta
AU  - Stagnaro, Paola
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2498
AB  - The growing interest in science community today is finding the ways to safely use mechanical energy which is
being released in small portions around us. The idea of this work is to use vibrational energy present everywhere
in small quantities to power the small-scale electronic devices used in everyday life. Flexible electronics,
which can be bent, rolled, and stretched into arbitrary shapes, would significantly expand the application of
modern electronic devices [1, 2].
As a lead-free piezoelectric material bismuth sodium titanate-barium titanate (BNBT) was selected and prepared
by a solid state reaction. Since, polymer polyvinylidene fluoride (PVDF) has interesting properties and advantages
over the other polymers, it was used as a matrix for the processing of polymer/ceramics flexible films by
hot pressing. Implementation of piezoelectric powder into the matrix of α- phase PVDF was performed under
the carefully optimized conditions of temperature and pressure. Three different volume rations of active phase
vs. polymer (BNBT 30, 35 and 40 vol%) were used for the preparation of flexible films. The homogeneous distribution
of piezoelectric powder in the polymer was obtained. IR analysis pointed that after the hot pressing,
in the obtained flexible films, there is a transformation of electrically inactive PVDF α-phase into electrically active
β and γ phases. Ferroelectric analysis evidenced the difficulties to obtain fully saturated hysteresis loops in
inhomogeneous ferroelectric materials due to the formation of charge layers at the ferroactive-polymer phase
interfaces. The dielectric permittivity for 40 vol% is nearly two times higher than for 30 vol% and eight times
higher than for pure PVDF, while the losses at room temperature (at 1 kHz) remain below 3 %. Anelastic measurements
confirmed the results obtained with the dielectric spectroscopy.
PB  - Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
C3  - Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
T1  - Lead-free piezoelectric flexible films
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2498
ER  - 

@conference{
author = "Vijatović Petrović, Mirjana and Rusanescu Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Galassi, Carmen and Ilić, Nikola and Bobić, Jelena and Brunengo, Elisabetta and Stagnaro, Paola",
year = "2020",
abstract = "The growing interest in science community today is finding the ways to safely use mechanical energy which is
being released in small portions around us. The idea of this work is to use vibrational energy present everywhere
in small quantities to power the small-scale electronic devices used in everyday life. Flexible electronics,
which can be bent, rolled, and stretched into arbitrary shapes, would significantly expand the application of
modern electronic devices [1, 2].
As a lead-free piezoelectric material bismuth sodium titanate-barium titanate (BNBT) was selected and prepared
by a solid state reaction. Since, polymer polyvinylidene fluoride (PVDF) has interesting properties and advantages
over the other polymers, it was used as a matrix for the processing of polymer/ceramics flexible films by
hot pressing. Implementation of piezoelectric powder into the matrix of α- phase PVDF was performed under
the carefully optimized conditions of temperature and pressure. Three different volume rations of active phase
vs. polymer (BNBT 30, 35 and 40 vol%) were used for the preparation of flexible films. The homogeneous distribution
of piezoelectric powder in the polymer was obtained. IR analysis pointed that after the hot pressing,
in the obtained flexible films, there is a transformation of electrically inactive PVDF α-phase into electrically active
β and γ phases. Ferroelectric analysis evidenced the difficulties to obtain fully saturated hysteresis loops in
inhomogeneous ferroelectric materials due to the formation of charge layers at the ferroactive-polymer phase
interfaces. The dielectric permittivity for 40 vol% is nearly two times higher than for 30 vol% and eight times
higher than for pure PVDF, while the losses at room temperature (at 1 kHz) remain below 3 %. Anelastic measurements
confirmed the results obtained with the dielectric spectroscopy.",
publisher = "Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference",
journal = "Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference",
title = "Lead-free piezoelectric flexible films",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2498"
}

Vijatović Petrović, M., Rusanescu Craciun, F., Cordero, F., MERCADELLI, E., Galassi, C., Ilić, N., Bobić, J., Brunengo, E.,& Stagnaro, P.. (2020). Lead-free piezoelectric flexible films. in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference..
https://hdl.handle.net/21.15107/rcub_rimsi_2498

Vijatović Petrović M, Rusanescu Craciun F, Cordero F, MERCADELLI E, Galassi C, Ilić N, Bobić J, Brunengo E, Stagnaro P. Lead-free piezoelectric flexible films. in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference. 2020;.
https://hdl.handle.net/21.15107/rcub_rimsi_2498 .

Vijatović Petrović, Mirjana, Rusanescu Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Galassi, Carmen, Ilić, Nikola, Bobić, Jelena, Brunengo, Elisabetta, Stagnaro, Paola, "Lead-free piezoelectric flexible films" in Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference (2020),
https://hdl.handle.net/21.15107/rcub_rimsi_2498 .

TY  - CONF
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Kaliyaperumal Veerapandiyan, Vignaswaran
AU  - Vijatović Petrović, Mirjana
AU  - Džunuzović, Adis
AU  - Vukmirovic, Jelena
AU  - Deluca, Marco
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2513
AB  - The search for multiferroic materials combining electric and magnetic properties in a single phase has attracted
a lot of attention in the perspective of future magnetoelectronic devices. A handful of single phase multiferroics
have been discovered so far, and most of them are not suitable for practical applications at present, either
because the room temperature polarization/magnetization is too small or their mutual coupling is too weak.
One of the most important single-phase multiferroic material with Aurivillius structure is Bi5Ti3FeO15 (BFT)
which generally yields a magnetoelectric coupling above room temperature. The main lack of this material is
high electrical conductivity and hence the lower ferro-electromagnetic properties. Since BFT has the capability
to host ions of different size, multiferroic properties could be improved by using dopants or ionic substitutions
on different A and B-sites of the structure.
To this respect, Co2+ and Y3+ doped BFT were prepared by the solid state reaction method according to formulas:
Bi1-xYxTi3FeO15 (x=0.1, 0.2, 0.3) and BiTi3Fe1-yCoyO15(y=0.1, 0.3, 0.5). Slightly improve of ferroelectric properties
was noticed with 0.3 mol% of Co while replacement of Bi3+ with Y3+ causes a reduction in orbital hybridization
between Bi 6sand O 2s/2porbitals leading to a decrease in electric polarization as a vector sum of all dipole
moments. Magnetic measurements confirm the antiferromagnetic nature of pure and Y doped ceramics while
Co-doped samples exhibit a typical ferromagnetic loop reveals the existence of FM interactions in these samples.
The largest Mr value appears in samples doped with 3 mol% of Co (Mr of 0.084 emu/g and Hc of 287 Oe). Raman
spectroscopy confirmed that Y prefer to replace Bi ions in the pseudo-perovkite layers while Co ions enter into
the lattice and occupy the Fe site inside of oxygen octahedral.
PB  - Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference
C3  - Electroceramics XVII, 2020, Darmstadt, 24-28 August 2020, Online Conference
T1  - Improving of ferroelectric and magnetic properties of Bi5Ti3FeO15 multiferroic materials with Y3+ and Co2+ partial substitution
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2513
ER  - 

@conference{
author = "Bobić, Jelena and Ilić, Nikola and Kaliyaperumal Veerapandiyan, Vignaswaran and Vijatović Petrović, Mirjana and Džunuzović, Adis and Vukmirovic, Jelena and Deluca, Marco",
year = "2020",
abstract = "The search for multiferroic materials combining electric and magnetic properties in a single phase has attracted
a lot of attention in the perspective of future magnetoelectronic devices. A handful of single phase multiferroics
have been discovered so far, and most of them are not suitable for practical applications at present, either
because the room temperature polarization/magnetization is too small or their mutual coupling is too weak.
One of the most important single-phase multiferroic material with Aurivillius structure is Bi5Ti3FeO15 (BFT)
which generally yields a magnetoelectric coupling above room temperature. The main lack of this material is
high electrical conductivity and hence the lower ferro-electromagnetic properties. Since BFT has the capability
to host ions of different size, multiferroic properties could be improved by using dopants or ionic substitutions
on different A and B-sites of the structure.
To this respect, Co2+ and Y3+ doped BFT were prepared by the solid state reaction method according to formulas:
Bi1-xYxTi3FeO15 (x=0.1, 0.2, 0.3) and BiTi3Fe1-yCoyO15(y=0.1, 0.3, 0.5). Slightly improve of ferroelectric properties
was noticed with 0.3 mol% of Co while replacement of Bi3+ with Y3+ causes a reduction in orbital hybridization
between Bi 6sand O 2s/2porbitals leading to a decrease in electric polarization as a vector sum of all dipole
moments. Magnetic measurements confirm the antiferromagnetic nature of pure and Y doped ceramics while
Co-doped samples exhibit a typical ferromagnetic loop reveals the existence of FM interactions in these samples.
The largest Mr value appears in samples doped with 3 mol% of Co (Mr of 0.084 emu/g and Hc of 287 Oe). Raman
spectroscopy confirmed that Y prefer to replace Bi ions in the pseudo-perovkite layers while Co ions enter into
the lattice and occupy the Fe site inside of oxygen octahedral.",
publisher = "Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference",
journal = "Electroceramics XVII, 2020, Darmstadt, 24-28 August 2020, Online Conference",
title = "Improving of ferroelectric and magnetic properties of Bi5Ti3FeO15 multiferroic materials with Y3+ and Co2+ partial substitution",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2513"
}

Bobić, J., Ilić, N., Kaliyaperumal Veerapandiyan, V., Vijatović Petrović, M., Džunuzović, A., Vukmirovic, J.,& Deluca, M.. (2020). Improving of ferroelectric and magnetic properties of Bi5Ti3FeO15 multiferroic materials with Y3+ and Co2+ partial substitution. in Electroceramics XVII, 2020, Darmstadt, 24-28 August 2020, Online Conference
Electroceramics XVII 2020, Darmstadt, 24-28 August 2020, Online Conference..
https://hdl.handle.net/21.15107/rcub_rimsi_2513

Bobić J, Ilić N, Kaliyaperumal Veerapandiyan V, Vijatović Petrović M, Džunuzović A, Vukmirovic J, Deluca M. Improving of ferroelectric and magnetic properties of Bi5Ti3FeO15 multiferroic materials with Y3+ and Co2+ partial substitution. in Electroceramics XVII, 2020, Darmstadt, 24-28 August 2020, Online Conference. 2020;.
https://hdl.handle.net/21.15107/rcub_rimsi_2513 .

Bobić, Jelena, Ilić, Nikola, Kaliyaperumal Veerapandiyan, Vignaswaran, Vijatović Petrović, Mirjana, Džunuzović, Adis, Vukmirovic, Jelena, Deluca, Marco, "Improving of ferroelectric and magnetic properties of Bi5Ti3FeO15 multiferroic materials with Y3+ and Co2+ partial substitution" in Electroceramics XVII, 2020, Darmstadt, 24-28 August 2020, Online Conference (2020),
https://hdl.handle.net/21.15107/rcub_rimsi_2513 .

TY  - JOUR
AU  - Vijatović Petrović, Mirjana
AU  - Džunuzović, Adis
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Stijepovi, Ivan
AU  - Stojanović, Biljana D
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1391
AB  - Composites based on barium titanate and nickel zinc ferrite doped with cooper and samarium were prepared by a mixing method. The formation of barium titanate tetragonal crystal structure and nickel zinc ferrite cubic spinel structure was identified. Polygonal grains were formed in all three types of ceramics. Due to the very high conductivity of ferrite phase in the materials the ferroelectric hysteresis loops were roundish and not typical for classical ferroelectric material. The break down field was found to be similar for all compositions. Leakage current measurements have shown the existence of different types of conductivity mechanisms in each material. The impedance analysis suggested a bit stronger impact of grain boundaries on total conductivity of the composites and the mechanism of polaronic conduction of two types. The magnetization of the composites is lower than for the pure ferrite phase and corresponds to the weight fraction of the ferrite phase. The soft magnetic nature of these composites might be very useful for development of multifunctional devices which will be able to switch the magnetization with small external magnetic field. Humidity sensing properties of the prepared ceramics were also investigated.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity
EP  - 18
IS  - 1
SP  - 9
VL  - 14
DO  - 10.2298/PAC2001009V
ER  - 

@article{
author = "Vijatović Petrović, Mirjana and Džunuzović, Adis and Bobić, Jelena and Ilić, Nikola and Stijepovi, Ivan and Stojanović, Biljana D",
year = "2020",
abstract = "Composites based on barium titanate and nickel zinc ferrite doped with cooper and samarium were prepared by a mixing method. The formation of barium titanate tetragonal crystal structure and nickel zinc ferrite cubic spinel structure was identified. Polygonal grains were formed in all three types of ceramics. Due to the very high conductivity of ferrite phase in the materials the ferroelectric hysteresis loops were roundish and not typical for classical ferroelectric material. The break down field was found to be similar for all compositions. Leakage current measurements have shown the existence of different types of conductivity mechanisms in each material. The impedance analysis suggested a bit stronger impact of grain boundaries on total conductivity of the composites and the mechanism of polaronic conduction of two types. The magnetization of the composites is lower than for the pure ferrite phase and corresponds to the weight fraction of the ferrite phase. The soft magnetic nature of these composites might be very useful for development of multifunctional devices which will be able to switch the magnetization with small external magnetic field. Humidity sensing properties of the prepared ceramics were also investigated.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity",
pages = "18-9",
number = "1",
volume = "14",
doi = "10.2298/PAC2001009V"
}

Vijatović Petrović, M., Džunuzović, A., Bobić, J., Ilić, N., Stijepovi, I.,& Stojanović, B. D.. (2020). Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 14(1), 9-18.
https://doi.org/10.2298/PAC2001009V

Vijatović Petrović M, Džunuzović A, Bobić J, Ilić N, Stijepovi I, Stojanović BD. Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity. in Processing and Application of Ceramics. 2020;14(1):9-18.
doi:10.2298/PAC2001009V .

Vijatović Petrović, Mirjana, Džunuzović, Adis, Bobić, Jelena, Ilić, Nikola, Stijepovi, Ivan, Stojanović, Biljana D, "Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity" in Processing and Application of Ceramics, 14, no. 1 (2020):9-18,
https://doi.org/10.2298/PAC2001009V . .

TY  - CONF
AU  - Ilić, Nikola
AU  - Bobić, Jelena
AU  - Vijatović Petrović, Mirjana
AU  - Džunuzović, Adis
AU  - Kaliyaperumal Veerapandiyan, Vignaswaran
AU  - Deluca, Marco
AU  - Stojanović, Biljana
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2606
AB  - Bismuth ferrite (BiFeO3) and bismuth titanate ferrite (Bi5Ti3FeO15) are studied a
lot in recent years because of their specific structure and potential to act as single phase
multiferrioics. Thanks to the optical band gap energy of 2.3-2.8 eV for BiFeO3 and 1.8-
2.3 eV for Bi5Ti3FeO15, these materials are also interesting for photocatalytic and solar
energy applications, and studies of using Bi5Ti3FeO15 for this purpose are very rare. Solgel
methods were used to produce BiFeO3 and BiFeO3-modified diatomaceous earth,
while Bi5Ti3FeO15 was obtained sol-gel and solid-state methods. These powders were
characterized, and their visible light photocatalytic activity for decomposition of
methylene blue was tested in acidic, close-to-neutral and alkaline conditions. Fenton-like
catalysis was also tested. Influence of synthesis method, microstructure, and catalyst
composition on dye degradation will help in proposing the mechanism of adsorption and
photocatalytic processes.
PB  - Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia
C3  - 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia
T1  - PHOTOCATALYTIC PROPERTIES OF BiFeO3 AND Bi5Ti3FeO15 BASED POWDERS
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2606
ER  - 

@conference{
author = "Ilić, Nikola and Bobić, Jelena and Vijatović Petrović, Mirjana and Džunuzović, Adis and Kaliyaperumal Veerapandiyan, Vignaswaran and Deluca, Marco and Stojanović, Biljana",
year = "2019",
abstract = "Bismuth ferrite (BiFeO3) and bismuth titanate ferrite (Bi5Ti3FeO15) are studied a
lot in recent years because of their specific structure and potential to act as single phase
multiferrioics. Thanks to the optical band gap energy of 2.3-2.8 eV for BiFeO3 and 1.8-
2.3 eV for Bi5Ti3FeO15, these materials are also interesting for photocatalytic and solar
energy applications, and studies of using Bi5Ti3FeO15 for this purpose are very rare. Solgel
methods were used to produce BiFeO3 and BiFeO3-modified diatomaceous earth,
while Bi5Ti3FeO15 was obtained sol-gel and solid-state methods. These powders were
characterized, and their visible light photocatalytic activity for decomposition of
methylene blue was tested in acidic, close-to-neutral and alkaline conditions. Fenton-like
catalysis was also tested. Influence of synthesis method, microstructure, and catalyst
composition on dye degradation will help in proposing the mechanism of adsorption and
photocatalytic processes.",
publisher = "Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia",
journal = "13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia",
title = "PHOTOCATALYTIC PROPERTIES OF BiFeO3 AND Bi5Ti3FeO15 BASED POWDERS",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2606"
}

Ilić, N., Bobić, J., Vijatović Petrović, M., Džunuzović, A., Kaliyaperumal Veerapandiyan, V., Deluca, M.,& Stojanović, B.. (2019). PHOTOCATALYTIC PROPERTIES OF BiFeO3 AND Bi5Ti3FeO15 BASED POWDERS. in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia
Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2606

Ilić N, Bobić J, Vijatović Petrović M, Džunuzović A, Kaliyaperumal Veerapandiyan V, Deluca M, Stojanović B. PHOTOCATALYTIC PROPERTIES OF BiFeO3 AND Bi5Ti3FeO15 BASED POWDERS. in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_rimsi_2606 .

Ilić, Nikola, Bobić, Jelena, Vijatović Petrović, Mirjana, Džunuzović, Adis, Kaliyaperumal Veerapandiyan, Vignaswaran, Deluca, Marco, Stojanović, Biljana, "PHOTOCATALYTIC PROPERTIES OF BiFeO3 AND Bi5Ti3FeO15 BASED POWDERS" in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia (2019),
https://hdl.handle.net/21.15107/rcub_rimsi_2606 .

TY  - CONF
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Stojanović, Biljana
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2600
AB  - Multiferroic composites with general formula Ba(Ti0.95Zr0.05)O3–Ni0.7Zn0.3Fe2O4/
CoFe2O4/Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4, (BTZr(95-5)–NZF/CF/NCuSmZF) were
prepared by mixing chemically obtained different types of ferrites and BTZ(95-5)
powders in the planetary mill for 24 h. The optimization of sintering process was
performed and powders were pressed and sintered at 1300 °C for obtained composites
samples. From X-ray analysis for single phase and composites ceramics can be noticed
the formation of crystallized structure of ferrites and barium zirconium titanate. SEM analyses indicated the formation of two types nanosized grains, polygonal ferromagnetic
and rounded ferroelectric grains.
The electrical properties of these materials were investigated using impedance
spectroscopy and analysis of ferroelectric measurements. Impedance analysis of all
investigated samples has shown different relaxation processes that originated from the
grain and grain boundary contributions. The results of polarization vs. electric field
measurements have shown the influence of magnetic phase type and its concentration on
the ferroelectric properties of the composites. Due to high conductivity of ferrite phases
and presence of interfacial polarization, the shapes of these curves differed from the
conventional ferroelectric materials.
PB  - Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia
C3  - 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia
T1  - INFLUENCE OF FERRITES PHASE ON PROPERTIES OF THE BARIUM ZIRCONIUM TITANATE BASED MULTIFERROIC COMPOSITES
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2600
ER  - 

@conference{
author = "Džunuzović, Adis and Vijatović Petrović, Mirjana and Bobić, Jelena and Ilić, Nikola and Stojanović, Biljana",
year = "2019",
abstract = "Multiferroic composites with general formula Ba(Ti0.95Zr0.05)O3–Ni0.7Zn0.3Fe2O4/
CoFe2O4/Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4, (BTZr(95-5)–NZF/CF/NCuSmZF) were
prepared by mixing chemically obtained different types of ferrites and BTZ(95-5)
powders in the planetary mill for 24 h. The optimization of sintering process was
performed and powders were pressed and sintered at 1300 °C for obtained composites
samples. From X-ray analysis for single phase and composites ceramics can be noticed
the formation of crystallized structure of ferrites and barium zirconium titanate. SEM analyses indicated the formation of two types nanosized grains, polygonal ferromagnetic
and rounded ferroelectric grains.
The electrical properties of these materials were investigated using impedance
spectroscopy and analysis of ferroelectric measurements. Impedance analysis of all
investigated samples has shown different relaxation processes that originated from the
grain and grain boundary contributions. The results of polarization vs. electric field
measurements have shown the influence of magnetic phase type and its concentration on
the ferroelectric properties of the composites. Due to high conductivity of ferrite phases
and presence of interfacial polarization, the shapes of these curves differed from the
conventional ferroelectric materials.",
publisher = "Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia",
journal = "13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia",
title = "INFLUENCE OF FERRITES PHASE ON PROPERTIES OF THE BARIUM ZIRCONIUM TITANATE BASED MULTIFERROIC COMPOSITES",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2600"
}

Džunuzović, A., Vijatović Petrović, M., Bobić, J., Ilić, N.,& Stojanović, B.. (2019). INFLUENCE OF FERRITES PHASE ON PROPERTIES OF THE BARIUM ZIRCONIUM TITANATE BASED MULTIFERROIC COMPOSITES. in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia
Faculty of Technology, University of Novi Sad Bul. cara Lazara 1, 21000 Novi Sad, Serbia..
https://hdl.handle.net/21.15107/rcub_rimsi_2600

Džunuzović A, Vijatović Petrović M, Bobić J, Ilić N, Stojanović B. INFLUENCE OF FERRITES PHASE ON PROPERTIES OF THE BARIUM ZIRCONIUM TITANATE BASED MULTIFERROIC COMPOSITES. in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_rimsi_2600 .

Džunuzović, Adis, Vijatović Petrović, Mirjana, Bobić, Jelena, Ilić, Nikola, Stojanović, Biljana, "INFLUENCE OF FERRITES PHASE ON PROPERTIES OF THE BARIUM ZIRCONIUM TITANATE BASED MULTIFERROIC COMPOSITES" in 13th Conference for Young Scientists in Ceramics, CYSC-2019, Novi Sad, Serbia (2019),
https://hdl.handle.net/21.15107/rcub_rimsi_2600 .