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Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties

Authorized Users Only
2010
Authors
Marković, Smilja
Uskoković, Dragan
Contributors
Priya, Shashank
Nair, K. M.
Conference object (Published version)
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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 o...f 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.

Source:
Advances in Electroceramic Materials II, 2010, 221, 3-17
Publisher:
  • Hoboken, NJ : John Wiley & Sons
Note:
  • Ceramic Transactions, Volume 221
  • 2009 Materials Science and Technology Conference (MS&T09) held at Pittsburgh, Pennsylvania, USA, October 25-29, 2009

DOI: 10.1002/9780470930915.ch1

ISBN: 978-047092716-8

ISSN: 1042-1122

Scopus: 2-s2.0-78149315301
[ Google Scholar ]
1
Handle
https://hdl.handle.net/21.15107/rcub_dais_3411
URI
https://dais.sanu.ac.rs/123456789/3411
Collections
  • ИТН САНУ - Општа колекција / ITS SASA - General collection
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASA
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 .

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