TY  - CONF
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2010
UR  - https://dais.sanu.ac.rs/123456789/3411
AB  - Barium titanate stannate (BaTi1-xSnxO3, BTS) functionally graded materials (FGMs) with different Ti/Sn concentration gradients were prepared by the powder processing method followed by sintering. Firstly, with the aim of tailoring the concentration gradient of Ti/Sn, the main characteristics of BTS ingredients were studied. The influence of the Ti/Sn concentration gradient on the electrical characteristics of the FGMs was examined by impedance spectroscopy (IS). The grain-interior and grain boundary resistivity of the FGMs were distinguished and activation energies were calculated. It has been established that for the FGMs the activation energy deduced from the grain-interior conductivity (0.74-0.78 eV) is defined by chemical composition (intrinsic property) and that it does not depend on the Ti/Sn concentration gradient. Quite contrary, the activation energy for the grain boundary conductivity (1.03-1.29 eV) is determined by the microstructural gradient which is a direct consequence of the concentration gradient. The results of IS indicate that there are no insulator interfaces (cracks and/or delamination) between graded layers in FGMs. This assumption was confirmed by in situ monitoring of the sintering processes in thermal microscope, and furthermore, by SEM analysis of FGMs in cross-sectional view.
PB  - Hoboken, NJ : John Wiley & Sons
C3  - Advances in Electroceramic Materials II
T1  - Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties
SP  - 3
EP  - 17
VL  - 221
DO  - 10.1002/9780470930915.ch1
UR  - https://hdl.handle.net/21.15107/rcub_dais_3411
ER  - 

@conference{
editor = "Priya, Shashank, Nair, K. M.",
author = "Marković, Smilja and Uskoković, Dragan",
year = "2010",
abstract = "Barium titanate stannate (BaTi1-xSnxO3, BTS) functionally graded materials (FGMs) with different Ti/Sn concentration gradients were prepared by the powder processing method followed by sintering. Firstly, with the aim of tailoring the concentration gradient of Ti/Sn, the main characteristics of BTS ingredients were studied. The influence of the Ti/Sn concentration gradient on the electrical characteristics of the FGMs was examined by impedance spectroscopy (IS). The grain-interior and grain boundary resistivity of the FGMs were distinguished and activation energies were calculated. It has been established that for the FGMs the activation energy deduced from the grain-interior conductivity (0.74-0.78 eV) is defined by chemical composition (intrinsic property) and that it does not depend on the Ti/Sn concentration gradient. Quite contrary, the activation energy for the grain boundary conductivity (1.03-1.29 eV) is determined by the microstructural gradient which is a direct consequence of the concentration gradient. The results of IS indicate that there are no insulator interfaces (cracks and/or delamination) between graded layers in FGMs. This assumption was confirmed by in situ monitoring of the sintering processes in thermal microscope, and furthermore, by SEM analysis of FGMs in cross-sectional view.",
publisher = "Hoboken, NJ : John Wiley & Sons",
journal = "Advances in Electroceramic Materials II",
title = "Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties",
pages = "3-17",
volume = "221",
doi = "10.1002/9780470930915.ch1",
url = "https://hdl.handle.net/21.15107/rcub_dais_3411"
}

Priya, S., Nair, K. M., Marković, S.,& Uskoković, D.. (2010). Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties. in Advances in Electroceramic Materials II
Hoboken, NJ : John Wiley & Sons., 221, 3-17.
https://doi.org/10.1002/9780470930915.ch1
https://hdl.handle.net/21.15107/rcub_dais_3411

Priya S, Nair KM, Marković S, Uskoković D. Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties. in Advances in Electroceramic Materials II. 2010;221:3-17.
doi:10.1002/9780470930915.ch1
https://hdl.handle.net/21.15107/rcub_dais_3411 .

Priya, Shashank, Nair, K. M., Marković, Smilja, Uskoković, Dragan, "Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties" in Advances in Electroceramic Materials II, 221 (2010):3-17,
https://doi.org/10.1002/9780470930915.ch1 .,
https://hdl.handle.net/21.15107/rcub_dais_3411 .

TY  - CONF
AU  - Mitić, Vojislav V.
AU  - Paunović, Vesna
AU  - Mančić, Dragan
AU  - Kocić, Ljubiša
AU  - Živkovic, Lj.
AU  - Pavlović, Vladimir B.
PY  - 2009
UR  - https://dais.sanu.ac.rs/123456789/3483
AB  - Taking into account that microstructure properties of barium-titanate based materials, expressed in grain boundary contacts, are of basic importance for electric properties of these material, in this study, the model of intergranular impedance is established using the equivalent electrical scheme characterized by corresponding frequency characteristic. Globally, BaTiO3 sample is consisted of a huge number of mutually contacted grains which form clusters. For each of them, it is possible to establish the equivalent electrical model and, for defined set of input parameters, using symbolic analysis, obtain the frequency diagram. Realizing the totality of relations betwecn clusters grains groups, their microelectrical schemes and corresponding frequency characteristics, from one side, and global equivalent electrical scheme and corresponding acquired frequency characteristics of BaTiO3 samples, on the other side, we set a goal of coinciding experimental results with the summing effect of microclectric equivalent schemes. The model is successfully tested on barium titanate ceramics doped with Er2O3Yb 2O3.
PB  - Hoboken, NJ : John Wiley & Sons
C3  - Advances in Electroceramic Materials
T1  - Dielectric properties of BaTiO3 doped with Er203 and Yb203 based on intergranular contacts model
VL  - 204
DO  - 10.1002/9780470528990.ch16
UR  - https://hdl.handle.net/21.15107/rcub_dais_3483
ER  - 

@conference{
editor = "Nair, K. M., Suvorov, Danilo, Schwartz, R. W., Guo, R.",
author = "Mitić, Vojislav V. and Paunović, Vesna and Mančić, Dragan and Kocić, Ljubiša and Živkovic, Lj. and Pavlović, Vladimir B.",
year = "2009",
abstract = "Taking into account that microstructure properties of barium-titanate based materials, expressed in grain boundary contacts, are of basic importance for electric properties of these material, in this study, the model of intergranular impedance is established using the equivalent electrical scheme characterized by corresponding frequency characteristic. Globally, BaTiO3 sample is consisted of a huge number of mutually contacted grains which form clusters. For each of them, it is possible to establish the equivalent electrical model and, for defined set of input parameters, using symbolic analysis, obtain the frequency diagram. Realizing the totality of relations betwecn clusters grains groups, their microelectrical schemes and corresponding frequency characteristics, from one side, and global equivalent electrical scheme and corresponding acquired frequency characteristics of BaTiO3 samples, on the other side, we set a goal of coinciding experimental results with the summing effect of microclectric equivalent schemes. The model is successfully tested on barium titanate ceramics doped with Er2O3Yb 2O3.",
publisher = "Hoboken, NJ : John Wiley & Sons",
journal = "Advances in Electroceramic Materials",
title = "Dielectric properties of BaTiO3 doped with Er203 and Yb203 based on intergranular contacts model",
volume = "204",
doi = "10.1002/9780470528990.ch16",
url = "https://hdl.handle.net/21.15107/rcub_dais_3483"
}

Nair, K. M., Suvorov, D., Schwartz, R. W., Guo, R., Mitić, V. V., Paunović, V., Mančić, D., Kocić, L., Živkovic, Lj.,& Pavlović, V. B.. (2009). Dielectric properties of BaTiO3 doped with Er203 and Yb203 based on intergranular contacts model. in Advances in Electroceramic Materials
Hoboken, NJ : John Wiley & Sons., 204.
https://doi.org/10.1002/9780470528990.ch16
https://hdl.handle.net/21.15107/rcub_dais_3483

Nair KM, Suvorov D, Schwartz RW, Guo R, Mitić VV, Paunović V, Mančić D, Kocić L, Živkovic L, Pavlović VB. Dielectric properties of BaTiO3 doped with Er203 and Yb203 based on intergranular contacts model. in Advances in Electroceramic Materials. 2009;204.
doi:10.1002/9780470528990.ch16
https://hdl.handle.net/21.15107/rcub_dais_3483 .

Nair, K. M., Suvorov, Danilo, Schwartz, R. W., Guo, R., Mitić, Vojislav V., Paunović, Vesna, Mančić, Dragan, Kocić, Ljubiša, Živkovic, Lj., Pavlović, Vladimir B., "Dielectric properties of BaTiO3 doped with Er203 and Yb203 based on intergranular contacts model" in Advances in Electroceramic Materials, 204 (2009),
https://doi.org/10.1002/9780470528990.ch16 .,
https://hdl.handle.net/21.15107/rcub_dais_3483 .