Electrical properties of barium titanate stannate functionally graded materials
Abstract
Barium titanate stannate (BTS) functionally graded materials (FGMs) with different tin/titanium concentration gradient were prepared by the powder-stacking method and uniaxially pressing process, followed by sintering. Impedance spectroscopy (IS) was used to determine the electrical characteristics of FGMs and ingredient BTS ceramics, as well as to distinguish the grain-interior and grain boundary resistivity of the ceramics. Activation energies of FGMs and ingredients were calculated. It has been established that for BTS ceramics the activation energy deduced from grain-interior conductivity (0.73-0.75 eV) is defined by chemical composition, while activation energy for grain boundary conductivity (1.07-1.25 eV) is influenced by microstructural development (density and average grain size). Furthermore, for FGMs, activation energy for grain-interior conductivity kept the intrinsic properties (0.74-0.78 eV) and did not depend on tin/titanium concentration gradient, while activation energ...y (1.03-1.29 eV) for grain boundary was determined by the microstructural gradient. No point dissipation was observed by IS, accordingly, no insulator interfaces (cracks and/or delamination) between graded layers were detected. © 2009 Elsevier Ltd. All rights reserved.
Keywords:
BaTiO3 / grain boundary / sintering / electrical properties / functionally graded materialsSource:
Journal of the European Ceramic Society, 2010, 30, 6, 1427-1435Publisher:
- Elsevier
Projects:
- Sinteza funkcionalnih materijala sa kontrolisanom strukturom na molekularnom i nano nivou (RS-142006)
DOI: 10.1016/j.jeurceramsoc.2009.10.020
ISSN: 0955-2219
WoS: 000275635000025
Scopus: 2-s2.0-75849140816
TY - JOUR AU - Marković, Smilja AU - Jovalekić, Čedomir AU - Veselinović, Ljiljana AU - Mentus, Slavko AU - Uskoković, Dragan PY - 2010 UR - http://dais.sanu.ac.rs/123456789/3425 AB - Barium titanate stannate (BTS) functionally graded materials (FGMs) with different tin/titanium concentration gradient were prepared by the powder-stacking method and uniaxially pressing process, followed by sintering. Impedance spectroscopy (IS) was used to determine the electrical characteristics of FGMs and ingredient BTS ceramics, as well as to distinguish the grain-interior and grain boundary resistivity of the ceramics. Activation energies of FGMs and ingredients were calculated. It has been established that for BTS ceramics the activation energy deduced from grain-interior conductivity (0.73-0.75 eV) is defined by chemical composition, while activation energy for grain boundary conductivity (1.07-1.25 eV) is influenced by microstructural development (density and average grain size). Furthermore, for FGMs, activation energy for grain-interior conductivity kept the intrinsic properties (0.74-0.78 eV) and did not depend on tin/titanium concentration gradient, while activation energy (1.03-1.29 eV) for grain boundary was determined by the microstructural gradient. No point dissipation was observed by IS, accordingly, no insulator interfaces (cracks and/or delamination) between graded layers were detected. © 2009 Elsevier Ltd. All rights reserved. PB - Elsevier T2 - Journal of the European Ceramic Society T1 - Electrical properties of barium titanate stannate functionally graded materials SP - 1427 EP - 1435 VL - 30 IS - 6 DO - 10.1016/j.jeurceramsoc.2009.10.020 ER -
@article{ author = "Marković, Smilja and Jovalekić, Čedomir and Veselinović, Ljiljana and Mentus, Slavko and Uskoković, Dragan", year = "2010", url = "http://dais.sanu.ac.rs/123456789/3425", abstract = "Barium titanate stannate (BTS) functionally graded materials (FGMs) with different tin/titanium concentration gradient were prepared by the powder-stacking method and uniaxially pressing process, followed by sintering. Impedance spectroscopy (IS) was used to determine the electrical characteristics of FGMs and ingredient BTS ceramics, as well as to distinguish the grain-interior and grain boundary resistivity of the ceramics. Activation energies of FGMs and ingredients were calculated. It has been established that for BTS ceramics the activation energy deduced from grain-interior conductivity (0.73-0.75 eV) is defined by chemical composition, while activation energy for grain boundary conductivity (1.07-1.25 eV) is influenced by microstructural development (density and average grain size). Furthermore, for FGMs, activation energy for grain-interior conductivity kept the intrinsic properties (0.74-0.78 eV) and did not depend on tin/titanium concentration gradient, while activation energy (1.03-1.29 eV) for grain boundary was determined by the microstructural gradient. No point dissipation was observed by IS, accordingly, no insulator interfaces (cracks and/or delamination) between graded layers were detected. © 2009 Elsevier Ltd. All rights reserved.", publisher = "Elsevier", journal = "Journal of the European Ceramic Society", title = "Electrical properties of barium titanate stannate functionally graded materials", pages = "1427-1435", volume = "30", number = "6", doi = "10.1016/j.jeurceramsoc.2009.10.020" }
Marković S, Jovalekić Č, Veselinović L, Mentus S, Uskoković D. Electrical properties of barium titanate stannate functionally graded materials. Journal of the European Ceramic Society. 2010;30(6):1427-1435
Marković, S., Jovalekić, Č., Veselinović, L., Mentus, S.,& Uskoković, D. (2010). Electrical properties of barium titanate stannate functionally graded materials. Journal of the European Ceramic SocietyElsevier., 30(6), 1427-1435. https://doi.org/10.1016/j.jeurceramsoc.2009.10.020
Marković Smilja, Jovalekić Čedomir, Veselinović Ljiljana, Mentus Slavko, Uskoković Dragan, "Electrical properties of barium titanate stannate functionally graded materials" 30, no. 6 (2010):1427-1435, https://doi.org/10.1016/j.jeurceramsoc.2009.10.020 .