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  - Bobić, Jelena
AU  - Ivanov, M.
AU  - Ilić, Nikola
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Banys, J.
AU  - Ribic, A.
AU  - Despotović, Z.
AU  - Stojanović, Biljana D
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1165
AB  - Comparative study of different PZT-based composite materials ((x)PbZr0.52Ti0.48O3 + (1-x)CoFe2O4 and (x) PbZr0.52Ti0.48O3 + (1-x)Ni0.7Zn0.3Fe2O4 (x = 0.8 and 0.9)) is presented in the frame of structural, dielectric, ferroelectric and magnetic properties. PZT and NZF/CF powders were synthesized by auto combustion technique. The composites were synthesized by mixing the appropriate amount of individual phases using conventional sintering. XRD data indicated the formation of well crystallized structure of PZT and NZF/CF, without the presence of undesirable phases. SEM micrographs revealed a uniform grain distribution of both, ferroelectric and ferromagnetic phases. Non-saturated hysteresis loops are evident in all samples due to the existence of nonferroelectric ferrite phase. All the samples exhibit typical ferromagnetic hysteresis loop, indicating the presence of the order magnetic structure. Dielectric investigations revealed that ferrites are the main source of charge carriers, which must be of electronic origin. The activation energy of effective electrical resistivity is heavily influenced by the ferroelectric phase.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - PZT-nickel ferrite and PZT-cobalt ferrite comparative study: Structural, dielectric, ferroelectric and magnetic properties of composite ceramics
EP  - 6557
IS  - 6
SP  - 6551
VL  - 44
DO  - 10.1016/j.ceramint.2018.01.057
ER  - 

@article{
author = "Bobić, Jelena and Ivanov, M. and Ilić, Nikola and Džunuzović, Adis and Vijatović Petrović, Mirjana and Banys, J. and Ribic, A. and Despotović, Z. and Stojanović, Biljana D",
year = "2018",
abstract = "Comparative study of different PZT-based composite materials ((x)PbZr0.52Ti0.48O3 + (1-x)CoFe2O4 and (x) PbZr0.52Ti0.48O3 + (1-x)Ni0.7Zn0.3Fe2O4 (x = 0.8 and 0.9)) is presented in the frame of structural, dielectric, ferroelectric and magnetic properties. PZT and NZF/CF powders were synthesized by auto combustion technique. The composites were synthesized by mixing the appropriate amount of individual phases using conventional sintering. XRD data indicated the formation of well crystallized structure of PZT and NZF/CF, without the presence of undesirable phases. SEM micrographs revealed a uniform grain distribution of both, ferroelectric and ferromagnetic phases. Non-saturated hysteresis loops are evident in all samples due to the existence of nonferroelectric ferrite phase. All the samples exhibit typical ferromagnetic hysteresis loop, indicating the presence of the order magnetic structure. Dielectric investigations revealed that ferrites are the main source of charge carriers, which must be of electronic origin. The activation energy of effective electrical resistivity is heavily influenced by the ferroelectric phase.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "PZT-nickel ferrite and PZT-cobalt ferrite comparative study: Structural, dielectric, ferroelectric and magnetic properties of composite ceramics",
pages = "6557-6551",
number = "6",
volume = "44",
doi = "10.1016/j.ceramint.2018.01.057"
}

Bobić, J., Ivanov, M., Ilić, N., Džunuzović, A., Vijatović Petrović, M., Banys, J., Ribic, A., Despotović, Z.,& Stojanović, B. D.. (2018). PZT-nickel ferrite and PZT-cobalt ferrite comparative study: Structural, dielectric, ferroelectric and magnetic properties of composite ceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 44(6), 6551-6557.
https://doi.org/10.1016/j.ceramint.2018.01.057

Bobić J, Ivanov M, Ilić N, Džunuzović A, Vijatović Petrović M, Banys J, Ribic A, Despotović Z, Stojanović BD. PZT-nickel ferrite and PZT-cobalt ferrite comparative study: Structural, dielectric, ferroelectric and magnetic properties of composite ceramics. in Ceramics International. 2018;44(6):6551-6557.
doi:10.1016/j.ceramint.2018.01.057 .

Bobić, Jelena, Ivanov, M., Ilić, Nikola, Džunuzović, Adis, Vijatović Petrović, Mirjana, Banys, J., Ribic, A., Despotović, Z., Stojanović, Biljana D, "PZT-nickel ferrite and PZT-cobalt ferrite comparative study: Structural, dielectric, ferroelectric and magnetic properties of composite ceramics" in Ceramics International, 44, no. 6 (2018):6551-6557,
https://doi.org/10.1016/j.ceramint.2018.01.057 . .

TY  - JOUR
AU  - Radojković, Aleksandar
AU  - Savić, Slavica M.
AU  - Jović, N.
AU  - Ćirković, Jovana
AU  - Despotović, Z.
AU  - Ribic, A.
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/871
AB  - BaCe(0.9)Ee(0.1)O(2.95) (BCE) nanopowder was synthesized by citric-nitric autocombustion method. Rietveld refinement analysis showed that unit cell volume was slightly larger compared with the most known BaCe0.9Y0.1O2.95, which might contribute to higher proton mobility. Sinterability of BaCeO3 is also enhanced by doping with Eu, since dense single-phased BCE electrolyte microstructure comprising of 1-2mm grains was obtained after sintering at 1450 degrees C for 5 h. The electrochemical impedance spectroscopy (EIS) analysis revealed separate bulk and grain boundary contributions to the total electrolyte conductivity below 200 degrees C. The grain boundary conductivity was one to two orders of magnitude lower than the bulk conductivity, indicating blocking effect of the grain boundaries to the mobility of charge carriers. This effect diminished completely above 500 degrees C and only total conductivities were determined between 500 and 700 degrees C. Conductivity of BCE in a wet hydrogen atmosphere at 600 degrees C reached 1.2 x 10(-2) S/cm, which can be considered as one of the highest conductivities among BaCeO3 based proton conductors.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Structural and electrical properties of BaCe(0.9)Ee(0.1)O(2.95) electrolyte for IT-SOFCs
EP  - 158
SP  - 153
VL  - 161
DO  - 10.1016/j.electacta.2015.02.075
ER  - 

@article{
author = "Radojković, Aleksandar and Savić, Slavica M. and Jović, N. and Ćirković, Jovana and Despotović, Z. and Ribic, A. and Branković, Zorica and Branković, Goran",
year = "2015",
abstract = "BaCe(0.9)Ee(0.1)O(2.95) (BCE) nanopowder was synthesized by citric-nitric autocombustion method. Rietveld refinement analysis showed that unit cell volume was slightly larger compared with the most known BaCe0.9Y0.1O2.95, which might contribute to higher proton mobility. Sinterability of BaCeO3 is also enhanced by doping with Eu, since dense single-phased BCE electrolyte microstructure comprising of 1-2mm grains was obtained after sintering at 1450 degrees C for 5 h. The electrochemical impedance spectroscopy (EIS) analysis revealed separate bulk and grain boundary contributions to the total electrolyte conductivity below 200 degrees C. The grain boundary conductivity was one to two orders of magnitude lower than the bulk conductivity, indicating blocking effect of the grain boundaries to the mobility of charge carriers. This effect diminished completely above 500 degrees C and only total conductivities were determined between 500 and 700 degrees C. Conductivity of BCE in a wet hydrogen atmosphere at 600 degrees C reached 1.2 x 10(-2) S/cm, which can be considered as one of the highest conductivities among BaCeO3 based proton conductors.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Structural and electrical properties of BaCe(0.9)Ee(0.1)O(2.95) electrolyte for IT-SOFCs",
pages = "158-153",
volume = "161",
doi = "10.1016/j.electacta.2015.02.075"
}

Radojković, A., Savić, S. M., Jović, N., Ćirković, J., Despotović, Z., Ribic, A., Branković, Z.,& Branković, G.. (2015). Structural and electrical properties of BaCe(0.9)Ee(0.1)O(2.95) electrolyte for IT-SOFCs. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 161, 153-158.
https://doi.org/10.1016/j.electacta.2015.02.075

Radojković A, Savić SM, Jović N, Ćirković J, Despotović Z, Ribic A, Branković Z, Branković G. Structural and electrical properties of BaCe(0.9)Ee(0.1)O(2.95) electrolyte for IT-SOFCs. in Electrochimica Acta. 2015;161:153-158.
doi:10.1016/j.electacta.2015.02.075 .

Radojković, Aleksandar, Savić, Slavica M., Jović, N., Ćirković, Jovana, Despotović, Z., Ribic, A., Branković, Zorica, Branković, Goran, "Structural and electrical properties of BaCe(0.9)Ee(0.1)O(2.95) electrolyte for IT-SOFCs" in Electrochimica Acta, 161 (2015):153-158,
https://doi.org/10.1016/j.electacta.2015.02.075 . .