Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrical Conductivity Revisited in Excess BaO into BaTiO3

BaO 과잉량에 따른 BaTiO3의 전기전도도

  • Yeo, Hong-Goo (Department of Ceramics Engineering, Changwon National University) ;
  • Kuk, Min-Ho (Department of Ceramics Engineering, Changwon National University) ;
  • Kim, Myong-Ho (Department of Ceramics Engineering, Changwon National University) ;
  • Song, Tae-Kwon (Department of Ceramics Engineering, Changwon National University) ;
  • Bae, Dong-Sik (Department of Ceramics Engineering, Changwon National University) ;
  • Park, Tne-Gone (Department of Electrical Engineering, Changwon National University) ;
  • Lee, Soon-Il (Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University) ;
  • Randall, Clive A. (Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University)
  • Published : 2005.05.01
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Abstract

In this study the electrical conductivity of excess BaO in $BaTiO_3$ was measured to investigate the relationship between defects and solubility in the temperature range of $900^{\circ}C$ to $1300^{\circ}C$ under various oxygen partial pressure. First of all, quenched $BaTiO_3$ powders of various Ba/Ti ratios were analysed by X-ray diffraction to confirm whether second phase is formed or not. As the results, we observed the solubility of BaO in the temperature range of $1200^{\circ}C$ to $1400^{\circ}C$, and it was also found that the conductivity minima move to lower $PO_2$ with increasing excess BaO within solubility limit.

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References

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