Evaluation of Grain Boundary Property in Oxide Ceramics by Isothermal Capacitance Trasient Spectroscopy

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J. Korean Ceram. Soc. > Volume 31(5); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(5): 529.

ICTS법을 이용한 산화물 세라믹스에서의 입계물성평가

김명철, 한응학¹, 강영석², 박순자²

군산대학교 공과대학 재료공학과
¹쌍용 중앙연구소
²서울대학교 공과대학 무기재료공학과

Evaluation of Grain Boundary Property in Oxide Ceramics by Isothermal Capacitance Trasient Spectroscopy

ABSTRACT

The principle of the Isothermal Capacitance Transient Spectroscopy[ICTS] were explained to measure the electronic trap levels in oxide ceramics. The measurement apparatus and the theory of the ICTS were described in detail. The trap energy evaluation was performed for the ZnO varistor and BaTiO3 ceramics. The grain boundary interface trap levels were detected at -5$0^{circ}C$~6$0^{circ}C$ in the case of ZnO varistor and PTCR samples, and the bulk trap levels were detected at 2$0^{circ}C$~60~ in BaTiO3. The trap energy levels of the above samples could be directly determined by ICTS measurement.