TY  - JOUR
AU  - Džunuzović, Adis
AU  - Vijatović Petrović, Mirjana
AU  - Stojadinović, B. S.
AU  - Ilić, Nikola
AU  - Bobić, Jelena
AU  - Foschini, Cesar Renato
AU  - Zaghete, M. A.
AU  - Stojanović, Biljana D
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/882
AB  - Nickel zinc ferrite (NZF) and barium titanate (BT) were prepared by auto-combustion synthesis as an effective, simple and rapid method. Multiferroic composites with the general formula yNi(1-x)Zn(x)Fe(2)O(4)-(1-y)BT (x=0.3, 0.5, 0.7, y=0.5) were prepared by mixing NZF and BT powders in a liquid medium in the ball mill. The FEG micrographs indicated the primary particle size less than 100 nm for both, barium titanate and nickel zinc ferrite phases. X-ray analysis and Raman spectroscopy indicated the formation of well crystallized structure of NZF and BT phase in the composite powders and ceramics, with a small contribution of the secondary phase. The homogenous phase distribution in obtained composites was also confirmed. Impedance spectroscopy measurements were carried out in order to investigate the electrical resistivity of materials, showing that grain boundaries have greater impact on the total resistivity than grains. Saturation magnetization and remnant magnetization continuously decrease with barium titanate phase increase.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method
EP  - 13200
IS  - 10
SP  - 13189
VL  - 41
DO  - 10.1016/j.ceramint.2015.07.096
ER  - 

@article{
author = "Džunuzović, Adis and Vijatović Petrović, Mirjana and Stojadinović, B. S. and Ilić, Nikola and Bobić, Jelena and Foschini, Cesar Renato and Zaghete, M. A. and Stojanović, Biljana D",
year = "2015",
abstract = "Nickel zinc ferrite (NZF) and barium titanate (BT) were prepared by auto-combustion synthesis as an effective, simple and rapid method. Multiferroic composites with the general formula yNi(1-x)Zn(x)Fe(2)O(4)-(1-y)BT (x=0.3, 0.5, 0.7, y=0.5) were prepared by mixing NZF and BT powders in a liquid medium in the ball mill. The FEG micrographs indicated the primary particle size less than 100 nm for both, barium titanate and nickel zinc ferrite phases. X-ray analysis and Raman spectroscopy indicated the formation of well crystallized structure of NZF and BT phase in the composite powders and ceramics, with a small contribution of the secondary phase. The homogenous phase distribution in obtained composites was also confirmed. Impedance spectroscopy measurements were carried out in order to investigate the electrical resistivity of materials, showing that grain boundaries have greater impact on the total resistivity than grains. Saturation magnetization and remnant magnetization continuously decrease with barium titanate phase increase.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method",
pages = "13200-13189",
number = "10",
volume = "41",
doi = "10.1016/j.ceramint.2015.07.096"
}

Džunuzović, A., Vijatović Petrović, M., Stojadinović, B. S., Ilić, N., Bobić, J., Foschini, C. R., Zaghete, M. A.,& Stojanović, B. D.. (2015). Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(10), 13189-13200.
https://doi.org/10.1016/j.ceramint.2015.07.096

Džunuzović A, Vijatović Petrović M, Stojadinović BS, Ilić N, Bobić J, Foschini CR, Zaghete MA, Stojanović BD. Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method. in Ceramics International. 2015;41(10):13189-13200.
doi:10.1016/j.ceramint.2015.07.096 .

Džunuzović, Adis, Vijatović Petrović, Mirjana, Stojadinović, B. S., Ilić, Nikola, Bobić, Jelena, Foschini, Cesar Renato, Zaghete, M. A., Stojanović, Biljana D, "Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method" in Ceramics International, 41, no. 10 (2015):13189-13200,
https://doi.org/10.1016/j.ceramint.2015.07.096 . .

TY  - JOUR
AU  - Bobić, Jelena
AU  - Vijatović Petrović, Mirjana
AU  - Ilić, Nikola
AU  - Palaimiene, E.
AU  - Grigalaitis, R.
AU  - Paiva-Santos, C. O.
AU  - Cilense, Mario
AU  - Stojanović, Biljana D
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/834
AB  - The processing of ferroelectric BaBi4Ti4O15 (BBT) ceramics from powders prepared by conventional solid state reaction (SSR) and mechanochemical activation (MA) has been investigated. It was shown that MA synthesis reduces the synthesis temperature of BBT powders, leading to smaller particles with reduced anisotropy and consequently to smaller grain size of ceramics. Dielectric properties were investigated in a wide range of temperatures (20-800 degrees C) and frequencies (1.21 kHz to 1 MHz). The relative dielectric permittivity at Curie temperature was higher for solid state obtained ceramics than for the mechanically treated ones. The conductivity of sintered samples was studied, suggesting decreasing of conductivity of BBT-MA in comparison with BBT-SS ceramics. The influence of the grain and the grain boundaries contribution to the dielectric behavior in both ceramics was analyzed through impedance spectroscopy. A well-defined ferroelectric hysteresis loop was obtained for both samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties
EP  - 316
IS  - 1
SP  - 309
VL  - 41
DO  - 10.1016/j.ceramint.2014.08.073
ER  - 

@article{
author = "Bobić, Jelena and Vijatović Petrović, Mirjana and Ilić, Nikola and Palaimiene, E. and Grigalaitis, R. and Paiva-Santos, C. O. and Cilense, Mario and Stojanović, Biljana D",
year = "2015",
abstract = "The processing of ferroelectric BaBi4Ti4O15 (BBT) ceramics from powders prepared by conventional solid state reaction (SSR) and mechanochemical activation (MA) has been investigated. It was shown that MA synthesis reduces the synthesis temperature of BBT powders, leading to smaller particles with reduced anisotropy and consequently to smaller grain size of ceramics. Dielectric properties were investigated in a wide range of temperatures (20-800 degrees C) and frequencies (1.21 kHz to 1 MHz). The relative dielectric permittivity at Curie temperature was higher for solid state obtained ceramics than for the mechanically treated ones. The conductivity of sintered samples was studied, suggesting decreasing of conductivity of BBT-MA in comparison with BBT-SS ceramics. The influence of the grain and the grain boundaries contribution to the dielectric behavior in both ceramics was analyzed through impedance spectroscopy. A well-defined ferroelectric hysteresis loop was obtained for both samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties",
pages = "316-309",
number = "1",
volume = "41",
doi = "10.1016/j.ceramint.2014.08.073"
}

Bobić, J., Vijatović Petrović, M., Ilić, N., Palaimiene, E., Grigalaitis, R., Paiva-Santos, C. O., Cilense, M.,& Stojanović, B. D.. (2015). Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(1), 309-316.
https://doi.org/10.1016/j.ceramint.2014.08.073

Bobić J, Vijatović Petrović M, Ilić N, Palaimiene E, Grigalaitis R, Paiva-Santos CO, Cilense M, Stojanović BD. Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties. in Ceramics International. 2015;41(1):309-316.
doi:10.1016/j.ceramint.2014.08.073 .

Bobić, Jelena, Vijatović Petrović, Mirjana, Ilić, Nikola, Palaimiene, E., Grigalaitis, R., Paiva-Santos, C. O., Cilense, Mario, Stojanović, Biljana D, "Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties" in Ceramics International, 41, no. 1 (2015):309-316,
https://doi.org/10.1016/j.ceramint.2014.08.073 . .

TY  - CONF
AU  - Bobić, Jelena
AU  - Vijatović Petrović, Mirjana
AU  - Ilić, Nikola
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Banys, Juras
AU  - Stojanović, Biljana
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2712
AB  - Bismuth layer-structured ferroelectrics (BLSF), first described by Aurivillius, have attracted much
attention for their application in non-volatile random access memory and high temperature piezoelectric
devices. BaBi4Ti4O15 (BBT) is a well-known member of BLSFs. Considering the grain size affect reduction
of conductivity of most of BLSF compounds [1] this paper dealing with effect of mechanochemical
assisted synthesis method on electrical, dielectric and conductive propefties of BBTcompounds.
BBT was prepared by solid state reaction from mixture of oxides: BaO, Ti02 and BizO: which was
previously milled for 6 h (BBT-MA). The mixture was heated at 850 oCfor 4 h. As a comparison, the same
ceramics were prepared throught conventional solid state reaction (BBT-SS). The same oxides mixture
was homogenized for 24 h in isopropanol and calcinated at 950 oC for 4 h which is 100 oC higher
temperature than for MA procedure. Sintering process was carried out at 1130 oC for t h in both
synthesis methods. Smaller plate like grains are noticed in BBT ceramics prepared from powders obtained
by MA process comparing to SS process (Fig 1.). In the temperature dependence of the dielectric
permittivity, the maximum associated to the Curie temperature was higher and narrower in ceramics
prepared by SS method. Influence of the grain and grain boundaries contribution to the dielectric
behaviour in both ceramics were analyzed through impedance spectroscopy.
PB  - COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014
C3  - COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014
T1  - Influence of Processing Method on Dielectric Properties of BaBi4Ti4O15 Ceramics
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2712
ER  - 

@conference{
author = "Bobić, Jelena and Vijatović Petrović, Mirjana and Ilić, Nikola and Džunuzović, Adis and Grigalaitis, Robertas and Banys, Juras and Stojanović, Biljana",
year = "2014",
abstract = "Bismuth layer-structured ferroelectrics (BLSF), first described by Aurivillius, have attracted much
attention for their application in non-volatile random access memory and high temperature piezoelectric
devices. BaBi4Ti4O15 (BBT) is a well-known member of BLSFs. Considering the grain size affect reduction
of conductivity of most of BLSF compounds [1] this paper dealing with effect of mechanochemical
assisted synthesis method on electrical, dielectric and conductive propefties of BBTcompounds.
BBT was prepared by solid state reaction from mixture of oxides: BaO, Ti02 and BizO: which was
previously milled for 6 h (BBT-MA). The mixture was heated at 850 oCfor 4 h. As a comparison, the same
ceramics were prepared throught conventional solid state reaction (BBT-SS). The same oxides mixture
was homogenized for 24 h in isopropanol and calcinated at 950 oC for 4 h which is 100 oC higher
temperature than for MA procedure. Sintering process was carried out at 1130 oC for t h in both
synthesis methods. Smaller plate like grains are noticed in BBT ceramics prepared from powders obtained
by MA process comparing to SS process (Fig 1.). In the temperature dependence of the dielectric
permittivity, the maximum associated to the Curie temperature was higher and narrower in ceramics
prepared by SS method. Influence of the grain and grain boundaries contribution to the dielectric
behaviour in both ceramics were analyzed through impedance spectroscopy.",
publisher = "COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014",
journal = "COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014",
title = "Influence of Processing Method on Dielectric Properties of BaBi4Ti4O15 Ceramics",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2712"
}

Bobić, J., Vijatović Petrović, M., Ilić, N., Džunuzović, A., Grigalaitis, R., Banys, J.,& Stojanović, B.. (2014). Influence of Processing Method on Dielectric Properties of BaBi4Ti4O15 Ceramics. in COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014
COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014..
https://hdl.handle.net/21.15107/rcub_rimsi_2712

Bobić J, Vijatović Petrović M, Ilić N, Džunuzović A, Grigalaitis R, Banys J, Stojanović B. Influence of Processing Method on Dielectric Properties of BaBi4Ti4O15 Ceramics. in COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014. 2014;.
https://hdl.handle.net/21.15107/rcub_rimsi_2712 .

Bobić, Jelena, Vijatović Petrović, Mirjana, Ilić, Nikola, Džunuzović, Adis, Grigalaitis, Robertas, Banys, Juras, Stojanović, Biljana, "Influence of Processing Method on Dielectric Properties of BaBi4Ti4O15 Ceramics" in COST MPO9O4: Single- and multiphase ferroics and multiferroies with restricted geometries (SIMUFER) Closing Conference and Final Management Committee Meeting, CNR-lENl: Institute for Energetics and lnterphases, Genoa, ltaly 30th January -'1st February, 2014 (2014),
https://hdl.handle.net/21.15107/rcub_rimsi_2712 .