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  - 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  - 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 . .