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Journal of the Korean Ceramic Society 1990;27(1): 7. |
MnO2첨가가 Y2O3 doped BaTiO3 반도체 세라믹스의 소결 및 PTCR특성에 미치는 영향 |
이준형, 박금덕1, 김정주, 조상희 |
경북대학교 재료공학과 1경북대학교 전자공학과 |
Effect of MnO2 Addition on Sintering and PTCR Properties in Y2O3 doped BaTiO3 Semiconducting Ceramics |
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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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