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J. Korean Ceram. Soc. > Volume 33(9); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(9): 1038.
$BaB_2B_4$ 첨가에 따른 반도성 $BaTiO_3$ 세라믹스의 소결 및 전기적 특성
허영우, 이준형, 김정주, 김남경, 조상희
경북대학교 무기재료공학과
Sintering and Electrical Characteristics of Semiconducting $BaTiO_3$ Ceramics with Addition of $BaB_2O_4$
The variations of sintering and electrical characteristics of semiconducting BaTiO3 ceramics with sintering agents added were investigated comparing the case of BaB2O4 addition to BN and TiO2 addition. When BaB2O4 added in BaTiO3 ceramics the densitifcation of specimen could be acheived more easily and recvealed the better PTCR characteristics than BN and TiO2 addition. As increase of addition of BaB2O4 in BaTiO3 spec imens the slope of resistivity jump also increased but the temperature of maximum resistivity decreased, It was supposed that addition of BaB2O4 led to increase of Ns (acceptor state density) value at grain boundaries.
Key words: $BaTiO_3$, PTCR, $BaB_2O_4$, $N_s$
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