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J. Korean Ceram. Soc. > Volume 33(11); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(11): 1231.
반도성 PTC $BaTiO_3$ 세라믹에서 전극의 접촉 저항 및 퇴화
박철우, 조경호1, 이희영, 이재열
영남대학교 무기재료공학과
1경남대학교 전자공학과
Contact Resistance and Electrode Degradation on Semiconducting PTC $BaTiO_3$ Ceramics
ABSTRACT
The electrode resistance of semiconducting PTC BaTiO3 ceramic material was studied in some detail. Comme-rical In-Ag paste In-Ga alloy and electroless plated Ni as well as evaporated Al were chosen as electrode. The contact resistance of electroded samples were measured by both dc resistivity and ac impedance analysis. The aging effect on contact resistance under cyclic loading from -1$0^{circ}C$ to 85$^{circ}C$ was also monitored for the prolonged period of time. In case of Al electroded samples the heat treatment and protective coating had effects on the stability against contact resistance degradation. It was also found that the samples with commercial In-Ag paste and electroless plated Ni electrode had good properties of contact resistance against aging.
Key words: PTC, Electrode, Contact resistance, Aging
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