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http://dx.doi.org/10.4191/KCERS.2004.41.8.605

Electrical and Dielectric Characteristics of Zn-Pr-Co-Er-M(M=Ni, Mg, Cr) Oxides-Based Varistors  

남춘우 (동의대학교 전기공학과)
김명준 (동의대학교 전기공학과)
Publication Information
Journal of the Korean Ceramic Society / v.41, no.8, 2004 , pp. 605-609 More about this Journal
Abstract
The microstructure, electrical and dielectric characteristics of ZnO varistors were investigated at various metal oxide (NiO, MgO, and Cr$_2$O$_3$) additives. The average grain size was increased with addition of NiO while that was decreased with addition of Cr$_2$O$_3$-Thereby, the varistor voltage was higher in Cr$_2$O$_3$-added composition. Among varistors, the varistor added with Cr$_2$O$_3$ exhibited the highest nonlinearity, with 40.5 in the nonlinear exponent and 2.7 ${\mu}$A in the leakage current and its dielectric dissipation factor was relatively low value of 0.0589.
Keywords
Microstructure; Nonlinear exponent; Nonlinearity; Leakage current; Dielectric dissipation factor;
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