Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical Properties of Donor-doped BaTiO3 Ceramics by Attrition Milling and Calcination Temperature

분쇄 방법 및 하소온도에 따른 Doner-doped BaTiO3의 전기적 특성

  • 이정철 (요업(세라믹)기술원 첨단소재부품팀) ;
  • 명성재 (요업(세라믹)기술원 첨단소재부품팀) ;
  • 전명표 (요업(세라믹)기술원 첨단소재부품팀) ;
  • 조정호 (요업(세라믹)기술원 첨단소재부품팀) ;
  • 김병익 (요업(세라믹)기술원 첨단소재부품팀) ;
  • 신동욱 (한양대학교 신소재공학과)
  • Published : 2008.03.01
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Abstract

In this study, We have been investigated the effect of calcination temperature and high-energy ball-milling of powder influences the $BaTiO_3$-based PTCR(Positive Temperature coefficient Resistance) characteristics and microstructure. The mixed powder was obtained from $BaCO_3$, $TiO_2$, $CeO_2$ ball-milled in attrition mill. The mixed powder was calcine from 1000 $^{\circ}C$ to 1200 $^{\circ}C$ in air and then it was sintered in reduction- re-oxidation atmosphere. As a result, The room-temperature electrical resistivity decreased and increased with increasing calcination temperature. specially, Attrition milled powder could have low room-temperature resistivity and high PTC jump order at 1100 $^{\circ}C$. attrition milling had lower room-temperature resistivity than ball milling. Particle size decreased by Attrition milling of powder influences in calcination temperature and room-temperature resistivity.

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References

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