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J. Korean Ceram. Soc. > Volume 25(4); 1988 > Article
Journal of the Korean Ceramic Society 1988;25(4): 349.
용융염 합성법에 의한 (Ba, Pb)TiO3의 PTCR효과
윤기현, 이만화
연세대학교 요업공학과
PTCR Effect in Molten Salt Systhesized Barium-Lead Titanate
The PTCR characteristics of (Ba0.8Pb0.2)TiO3 ceramics prepared by the molten salt sysnthesis (MSS) method have been investigated as a function of the amount of Nb2O5 dopant and KCl flux. When the weight ratio of KCl to raw material is 0.8, the resistivity at room temperature decreases with increasing amount of Nb dopant up to 0.6 atom%. It can be explained by compensation for electrons due to Nb+5 ion and holes due to K+ ion. The resistivity of (Ba0.8Pb0.2)(Ti0.994Nb0.006)O3 ceramics at room temperature decreases with increasing the ratio of KCl to raw material up to 0.6, and then increases. These results can be explained by the effect of K+ ion.
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