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  - JOUR
AU  - Grigalaitis, Robertas
AU  - Salasevicius, R.
AU  - Banys, Juras
AU  - Vijatović Petrović, Mirjana
AU  - Džunuzović, Adis
AU  - ZAGHETE, MARIA
AU  - Ferreira Teixeira, Guilhermina
AU  - Stojanović, Biljana D
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2104
AB  - Flexible multiferroic composite films are perspective materials for sensors, actuators and similar com-ponents of wearable and stretchable devices. Here we present the study of functional properties of flexible composites prepared by embedding nickel zinc ferrite and barium titanate powder into polyvinylidene fluo-ride (PVDF) polymer optimizing the ratio of polymer and fillers to get the best flexibility and functionality. ATR-FTIR analysis revealed that hot pressing of the flexible films causeda transformation of about 38% of the electro-inactive PVDF α phase into electrically active β and γ phases. Broadband dielectric spectroscopy revealed two relaxation processes responsible for PVDF and space charge relaxations. Activation energies of  both  processes  and  the  freezing  temperature  of  PVDF  to  the  glass  phase  were  estimated  for  all  films.  Ferroelectric  measurements  have  shown  unsaturated  hysteresis  loops  for  all  samples,  although  the  clear  dependence of the amount of the electrically active phase on polarization values of composites is visible.
PB  - Lietuvos mokslų akademija
T2  - Lithuanian Journal of Physics
T1  - FUNCTIONAL PROPERTIES OF PVDF-BASED NZF-BT FLEXIBLE FILMS
EP  - 204
IS  - 4
SP  - 195
VL  - 62
DO  - 10.3952/physics.v62i4.4825
ER  - 

@article{
author = "Grigalaitis, Robertas and Salasevicius, R. and Banys, Juras and Vijatović Petrović, Mirjana and Džunuzović, Adis and ZAGHETE, MARIA and Ferreira Teixeira, Guilhermina and Stojanović, Biljana D",
year = "2022",
abstract = "Flexible multiferroic composite films are perspective materials for sensors, actuators and similar com-ponents of wearable and stretchable devices. Here we present the study of functional properties of flexible composites prepared by embedding nickel zinc ferrite and barium titanate powder into polyvinylidene fluo-ride (PVDF) polymer optimizing the ratio of polymer and fillers to get the best flexibility and functionality. ATR-FTIR analysis revealed that hot pressing of the flexible films causeda transformation of about 38% of the electro-inactive PVDF α phase into electrically active β and γ phases. Broadband dielectric spectroscopy revealed two relaxation processes responsible for PVDF and space charge relaxations. Activation energies of  both  processes  and  the  freezing  temperature  of  PVDF  to  the  glass  phase  were  estimated  for  all  films.  Ferroelectric  measurements  have  shown  unsaturated  hysteresis  loops  for  all  samples,  although  the  clear  dependence of the amount of the electrically active phase on polarization values of composites is visible.",
publisher = "Lietuvos mokslų akademija",
journal = "Lithuanian Journal of Physics",
title = "FUNCTIONAL PROPERTIES OF PVDF-BASED NZF-BT FLEXIBLE FILMS",
pages = "204-195",
number = "4",
volume = "62",
doi = "10.3952/physics.v62i4.4825"
}

Grigalaitis, R., Salasevicius, R., Banys, J., Vijatović Petrović, M., Džunuzović, A., ZAGHETE, M., Ferreira Teixeira, G.,& Stojanović, B. D.. (2022). FUNCTIONAL PROPERTIES OF PVDF-BASED NZF-BT FLEXIBLE FILMS. in Lithuanian Journal of Physics
Lietuvos mokslų akademija., 62(4), 195-204.
https://doi.org/10.3952/physics.v62i4.4825

Grigalaitis R, Salasevicius R, Banys J, Vijatović Petrović M, Džunuzović A, ZAGHETE M, Ferreira Teixeira G, Stojanović BD. FUNCTIONAL PROPERTIES OF PVDF-BASED NZF-BT FLEXIBLE FILMS. in Lithuanian Journal of Physics. 2022;62(4):195-204.
doi:10.3952/physics.v62i4.4825 .

Grigalaitis, Robertas, Salasevicius, R., Banys, Juras, Vijatović Petrović, Mirjana, Džunuzović, Adis, ZAGHETE, MARIA, Ferreira Teixeira, Guilhermina, Stojanović, Biljana D, "FUNCTIONAL PROPERTIES OF PVDF-BASED NZF-BT FLEXIBLE FILMS" in Lithuanian Journal of Physics, 62, no. 4 (2022):195-204,
https://doi.org/10.3952/physics.v62i4.4825 . .