Semiconducting Barium Titanate Ceramics Prepared by Boron‐Containing Liquid‐Phase Sintering
- 8 March 1994
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 77 (3) , 829-832
- https://doi.org/10.1111/j.1151-2916.1994.tb05372.x
Abstract
Semiconducting BaTiO3 ceramics have been prepared by adding BN as a sintering aid. Density as high as 93% of theoretical and grain size as large as 16 μm are obtained after sintering at 1160°C. Most significant is that the semiconducting BaTiO3 is obtained at sintering temperatures as low as 1100°C. The low‐temperature‐sintered BaTiO3 exhibits a positive temperature coefficient. (PTC) anomaly above 120°C with a resistivity maximum at a temperature as high as 400°C, which is much higher than that of the conventional BaTiO3. The incorporation of B into the perovskite structure is negligible. Also, the presence of B at a grain boundary after sintering is believed to enhance the PTC effect.Keywords
This publication has 11 references indexed in Scilit:
- Positive Temperature Coefficient of Resistivity Effect in Undoped, Atmospherically Reduced Barium TitanateJournal of the American Ceramic Society, 1989
- PTC Effect in BaTiO3 as a Function of Doping with 3d ElementsJournal of the American Ceramic Society, 1981
- Preparation, Characterization, and Properties of Dy‐Doped Small‐Grained BaTiO3 CeramicsJournal of the American Ceramic Society, 1977
- Effect of Rare‐Earth Ions on Electrical Conductivity of BaTiO3 CeramicsJournal of the American Ceramic Society, 1973
- Exaggerated Grain Growth in Liquid‐Phase Sintering of BaTiO3Journal of the American Ceramic Society, 1971
- Halogen treatment of barium titanate semiconductorsMaterials Research Bulletin, 1967
- Some aspects of semiconducting barium titanateSolid-State Electronics, 1964
- Crystallization and Phase Relations of Boron Trioxide at High PressuresJournal of the American Ceramic Society, 1961
- Phase Equilibria in the System BaTiO3‐SiO2Journal of the American Ceramic Society, 1955
- Phase Equilibria in the System BaO–TiO2Journal of the American Ceramic Society, 1955