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J. Korean Ceram. Soc. > Volume 22(3); 1985 > Article
Journal of the Korean Ceramic Society 1985;22(3): 13.
용융염 합성법에 의한 반도성 $BaTiO_3$의 PTCR 효과
윤기현, 오기영
연세대학교 공과대학 요업공학과
PTCR Effects in Molten Salt System Synthesized Semiconductive $BaTiO_3$
ABSTRACT
Semiconductive $Ba_{0.9}Sr_{0.1}TiO_3$ was prepared by both the Calcining of mixed Oxides (C. M. O) and the Molten Salt Synthesis(M.S.S) methods to investigate the PTCR effects. In the Molten Salt Synthesis method the temperature of calcination for Synthesis of $BaTiO_3$ could be lowered from 110$0^{circ}C$ to 80$0^{circ}C$. The M.S.S Specimens had smaller grain size and more homogeneous size distribution at the same sintering temperature as compared with the C. M. O specimens. The M. S. S. specimens showed greater PTCR effects and current variations in the time vs. current charac-teristics than those of C. M. O Specimens.
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