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J. Korean Ceram. Soc. > Volume 31(1); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(1): 39.
$LiTaO_3$ 단결정 성장과 용기 및 분위기의 영향
박승익, 채승욱1, 김정돈2, 주기태2, 정수진
서울대학교 무기재료공학과
1(주)대우전자부품 기술관리실
2한국과학기술연구원 세라믹스부
Crystal Growth of $LiTaO_3$ and the Effect pf Crucible Type and Atmosphere
ABSTRACT
LiTaO3 single crystals were growth without cracking using Pt-Rh crucible and Ir crucible. The starting composition to get the melt of congruent melting composition, which has been dependent upon the experimental procedure, was taken after fixing the total growing process by the result of preliminary experiments. The Rh contamination from the Pt-Rh crucible was to be neglected if the crystal had been grown under inert atmosphere, which resulted in the crystal color being slightly yellow. This color was decolored after 24 hour's annealing at 1200℃ under air atmosphere. The optimum conditions for the crystal growing and the diameter control were so dependent upon the crucible material in spite of using the crucible of the same size. The liquid-solid interface of LiTaO3 crystal of 1" diameter has been flat if the rotation speed was 45rpm.
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