Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Stability of ZnO-$Pr_{6}O_{11}$-CoO-$Cr_{2}O_{3}-Dy_{2}O_3$-Based Varistors with d.c. Stress

ZnO-$Pr_{6}O_{11}$-CoO-$Cr_{2}O_{3}-Dy_{2}O_3$계 바리스터의 d.c. 스트레스에 따른 안정성에 관한 연구

  • Voon, Han-Soo (Department of Electrical Engineering, Dong-Eui University) ;
  • Ryu, Jung-Sun (Department of Electrical Engineering, Dong-Eui University) ;
  • Nahm, Choon-Woo (Department of Electrical Engineering, Dong-Eui University)
  • 윤한수 (동의대학교 전자공학과) ;
  • 류정선 (동의대학교 전자공학과) ;
  • 남춘우 (동의대학교 전자공학과)
  • Published : 2000.07.17
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Abstract

The stability of ZnO-$Pr_{6}O_{11}$-CoO-$Cr_{2}O_{3}-Dy_{2}O_3$ based varistors with d.c. stress were investigated. ZnO varistor doped with 4.0 mol% $Dy_{2}O_3$ exhibited the highest nonlinear exponet, but stability was very poor because of low density. In particular, the varistor containing 0.5 mol% $Dy_{2}O_3$ showed very excellent V-I characteristic, which the nonlinear exponent was 67.39 and leakage current was 1.18 ${\mu}A$, and high stability.

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