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 |
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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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