Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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The Effect of Ti/Sr Ratio on Abnormal Grain Growth of Nb-doped $SrTiO_3$

$Nb_2O_5$를 첨가한 $SrTiO_3$의 비정상 입성장에 미치는 Ti/Sr 비의 영향

  • 배철휘 (한국과학기술연구원 세라믹스 연구부) ;
  • 전형탁 (한양대학교 금속공학과) ;
  • 박재관 (한국과학기술연구원 세라믹스 연구부) ;
  • 김윤호 (한국과학기술연구원 세라믹스 연구부)
  • Published : 1997.08.01
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Abstract

The influence of Ti/Sr ratio on abnormal grain growth of Nb-doped SrTiO3 was investigated. For specimens which were isothermally sintered at temperatures above 144$0^{\circ}C$, the nucleation and growth rates of abnormal grain growth were decreased with increasing Ti/Sr ratio. But the onset time of abnormal grain growth was increased with increasing Ti/Sr ratio. The cross-section of abnormally grown grains was mostly hexagonal. When the specimens were quenched in air after they reached their setting temperatures at a heating rate of 3$^{\circ}C$/min, the onset temperature of abnormal grain growth was increased with increasing Ti/Sr ratio and the final grain size was independent of Ti/Sr ratio. The cross-section of abnormally grown grains was mostly rectangular.

Keywords

References

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