Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical Properties of ZPCCT-based Varistor Ceramics

  • Nahm, Choon-Woo (Department of Electrical Engineering, Dongeui University)
  • Published : 2007.07.26
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Abstract

The microstructure and electrical properties of Zn-Pr-Co-Cr-Tb oxide-based varistors were investigated for different $Tb_4O_7$ amounts. As the $Tb_4O_7$ amount increased, the average grain size decreased from 7.7 to $4.8{\mu}m$ and the sintered density increased from 5.73 to $5.84g/cm^3$. As the $Tb_4O_7$ amount increased, the varistor voltage increased from 280.9 to 715.8V/mm and the nonlinear coefficient increased from 26.4 to 44.4. It is assumed that these varistors can be applied for high power with compact size.

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References

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