Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Electrical and Clamping Voltage Characteristics of ZPCCY-Based Varistor Ceramics

ZPCCY계 바리스터 세라믹스의 전기적 특성 및 제한전압 특성

  • Park, Jong-Ah (Department of Electrical Engineering, Dong-Eui University) ;
  • Kim, Myung-Jun (Department of Electrical Engineering, Dong-Eui University) ;
  • Yoo, Dea-Hoon (Department of Electrical Engineering, Dong-Eui University) ;
  • Nahm, Choon-Woo (Department of Electrical Engineering, Dong-Eui University)
  • 박종아 (동의대학교 전기공학과) ;
  • 김명준 (동의대학교 전기공학과) ;
  • 유대훈 (동의대학교 전기공학과) ;
  • 남춘우 (동의대학교 전기공학과)
  • Published : 2004.07.14
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Abstract

The microstructure, electrical, and clamping voltage characteristics of ZPCCY-based varistor ceramics were investigated in the sintering time range of 1${\sim}$3 h. Increasing sintering time promoted the densification, in which the average grain size and density are increased in the range of $11.4{\sim}16.0{\mu}m$ and $5.34{\sim}5.54g/cm^3$, respectively. The nonlinear exponent decresed in the range of 60${\sim}$26 and the leakage current increased in the range of $1.3{\sim}10.7{\mu}A$ with increase of sintering time. The clamping voltage ratio was less than 2 for ratio surge current of 10 A over sintering times.

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