Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Temperature Gradient on the Defects of Nd;YAG Single Crystal Grown by Czochralski Method

융액인상법에 의한 Nd;YAG 단결정 성장시 온도구배의 변화에 따른 결함거동

  • 김한태 (쌍용중앙연구소 신소재연구실) ;
  • 배소익 (쌍용중앙연구소 신소재연구실) ;
  • 이상호 (쌍용중앙연구소 신소재연구실) ;
  • 정수진 (서울대학교 재료공학부)
  • Published : 1997.10.01
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Abstract

In the Nd;YAG crystal growth by Czochralski method, the relationship between the core formation and the solid-liquid interface was observed by controlling the temperature gradient in the furnace. When the crystal was grown along<111> direction, defects and core area were reduced as the temperature gradient increased. The optimum temperature gradient was found to be higher than 4$0^{\circ}C$/cm. The Nd3+ concentration analysis by ICP-Mass showed that the segregation coefficient was about 20% higher in the core region than core-free region, where the segregation coefficients of core region and core-free region were 0.22 and 0.18, respectively.

Keywords

References

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