Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Effects of Annealing on the Microstructure and Electrical Properties of ZnO Varistor

ZnO 바리스터 제조시 소결후 열처리 조건에 따른 미세구조 및 전기적 특성에 관한 연구

  • Soh, J.J. (Div. of electric materials, Korea Electrotechnology Research Institute) ;
  • Han, S.W. (Div. of electric materials, Korea Electrotechnology Research Institute) ;
  • Kim, H.S. (Div. of electric materials, Korea Electrotechnology Research Institute)
  • 소진중 (한국전기연구소 전기재료연구부 소재기술연구팀) ;
  • 한세원 (한국전기연구소 전기재료연구부 소재기술연구팀) ;
  • 김형식 (한국전기연구소 전기재료연구부 소재기술연구팀)
  • Published : 1996.07.22
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Abstract

ZnO varistor with composition of 89wt%-ZnO, 3.0wt%-$Bi_{2}O_{3}$, 3.6wt%-$Sb_{2}O_{3}$, 1.16wt%-CoO, 0.88wt%-NiO, 0.71wt%-$MnO_2$, 0.93wt%-$Cr_{2}O_{3}$, 0.013wt%-$Al_{2}O_{3}$ was fabricated by sintering methods. The effects of annealing on the J-E characteristics of ZnO varistors were investigated. These changes of electric properties were found to be caused by the variation of grains and grain boundary related to annealing. And the conductive mechanism and micostructure of ZnO varistor were researched using I-V meter, SEM and XRD.

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