Barium titanate stannate functionally graded materials: Choosing of the Ti/Sn concentration gradient and the influence of the gradient on electrical properties
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, 3-17Publisher:
- 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
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - 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 .