한국재료학회지 (Korean Journal of Materials Research)

  • 제15권3호
  • /
  • Pages.143-148
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  • 2005
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  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
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ZPCCY계 바리스터 세라믹스의 전기적 성질 및 제한전압 특성

Electrical Properties and Clamping Voltage Characteristics of ZPCCY-Based Varistor Ceramics

  • 남춘우 (동의대학교 전기공학과) ;
  • 박종아 (동의대학교 전기공학과)
  • Nahm Choon-Woo (Department of Electrical Engineering, Dongeui University) ;
  • Park Jong-Ah (Department of Electrical Engineering, Dongeui University)
  • 발행 : 2005.03.01
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초록

The microstructure, electrical properties, and clamping voltage characteristics of $ZnO-Pr_6O_{11}-CoO-Cr_2O_3-Y_2O_3(ZPCCY)-based$ varistor ceramics sintered at $1350^{\circ}C$ were investigated as a function of sintering time from 1 to 3 h. With increasing sintering time, the average grain size and density increased in the range of $11.4\~16.0\;{\mu}m$ and $5.34\~5.54g/cm^3$, respectively, in accordance of increasing sintering time. The nonlinear exponent decreased in the range of $60\~26$ and the leakage current increased in the range of $1.3\~10.7\;{\mu}A$ with increasing sintering time. The clamping voltage ratio increased in the range $1.58\~1.65$ for ratio surge current of 10 A as the sintering time increased.

키워드

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