Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of MnO2 Addition on Sintering and PTCR Properties in Y2O3 doped BaTiO3 Semiconducting Ceramics

MnO2첨가가 Y2O3 doped BaTiO3 반도체 세라믹스의 소결 및 PTCR특성에 미치는 영향

  • Published : 1990.01.01
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Abstract

The influence of MnO2 on the sintering property and PTCR behavior of(Ba0.8Sr0.2)TiO2 has been investigated. And the densities, grain sizes and electrical resitivities of specimens were measured as a function of doping with Mn ion of varying concentration. The density and grain size of the sintered specimens were almost the same regardless of MnO2 addition up to 0.2mol% MnO2. But in the case of 0.25mol% MnO2 addition, abnormal grain growth was appeared. So the grain size distribution was wide and density decreased greatly. The room-temperature resistivity increased as Mn content increased and the temperature coefficient of resistivity was highest in the case of 0.15mol% MnO2 addition.

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References

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