A Study on the Stability of Praseodymium-Based Zinc Oxide Varistor with Tittria Additives.

이트리아가 첨가된 프라세오디뮴계 산화아연 바리스터의 안정성에 관한 연구

  • 남춘우 (동의대학교 전기공학과) ;
  • 박춘현 (동의대학교 전기공학과)
  • Published : 1998.10.01

Abstract

The stability of paraseodymium-based zinc oxide varistor consisting of Zn-Pr-Co-Cr-Y oxide was investigated according to yttria additives under different stress conditons, such as 0.8V\ulcorner\ulcorner/373K/12h and 0.85V\ulcorner\ulcorner/393K/12h. Wholly, all varistor after the stress showed nearly symmetric and stable I-V characteristics. Particularly, in the case of 2.0mol% and 4.0mol% yttria-added varistor showing a good I-V characteristics, the varation rate of varistor voltage were less 1% and that of nonlinear coefficient were about degree of 5%, and what is remarkable, leakage current with increasing stress time during the applied stress was almost constant. It the light of these facts, it is estimated that varistor constituents having 2.0mol% and 4.0mol% yittria, respectively, will be utilized to various application fields.

Keywords

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