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J. Korean Ceram. Soc. > Volume 42(5); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(5): 308.
doi: https://doi.org/10.4191/kcers.2005.42.5.308
BaO 과잉량에 따른 BaTiO3의 전기전도도
여홍구, 국민호, 김명호, 송태권, 배동식, 박태곤1, 이순일2, Clive A. Randall2
창원대학교 세라믹공학과
1창원대학교 전기공학과
Electrical Conductivity Revisited in Excess BaO into BaTiO3
Hong-Goo Yeo, Min-Ho Kuk, Myong-Ho Kim, Tae-Kwon Song, Dong-Sik Bae, Tne-Gone Park1, Soon-Il Lee2, Clive A. Randall2
Department of Ceramics Engineering, Changwon National University
1Department of Electrical Engineering, Changwon National University
2Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University
ABSTRACT
In this study the electrical conductivity of excess BaO in $BaTiO_3$ was measured to investigate the relationship between defects and solubility in the temperature range of $900^{circ}C$ to $1300^{circ}C$ under various oxygen partial pressure. First of all, quenched $BaTiO_3$ powders of various Ba/Ti ratios were analysed by X-ray diffraction to confirm whether second phase is formed or not. As the results, we observed the solubility of BaO in the temperature range of $1200^{circ}C$ to $1400^{circ}C$, and it was also found that the conductivity minima move to lower $PO_2$ with increasing excess BaO within solubility limit.
Key words: Conductivity, Solid solution, Ba/Ti ratio
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