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J. Korean Ceram. Soc. > Volume 31(10); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(10): 1089.
반도성 $BaTiO_3$ 세라믹스의 미세구조 및 PTCR 특성에 미치는 $Si_3N_4$ 첨가효과
김준수, 정윤해1, 이병하1
한국에너지기술연구소 에너지재료연구팀
1명지대학교 공과대학교 무기재료공학과
Effect of $Si_3N_4$ Addition on the Microstructure and PTCR Characteristics in Semiconducting $BaTiO_3$ Ceramics
The effect of Si3N4 addition on the microstructure and PTCR characteristics of BaTiO3 was studied. When 0.1 mol% Sb2O3-doped BaTiO3 codoped with Si3N4 (0.1, 0.25, 0.5, 0.75, and 1 wt%, respectively) were sintered, their microstructures were changed by the amount of the liquid phase as a result of eutectic reaction at 126$0^{circ}C$. By these microstructural changes, the specific resistivity ratio($rho$max/$rho$min) with Si3N4 content variation of 0.1 mol% Sb2O3-doped BaTiO3 ceramics sintered at 130$0^{circ}C$ for 1 hour varied between 3.70$times$102(0.1 wt% Si3N4) to 1.16$times$103 (1wt% Si3N4).
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