Single Crystals Growth of Cubic Zirconia by Skull Method

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J. Korean Ceram. Soc. > Volume 25(2); 1988 > Article

Journal of the Korean Ceramic Society 1988;25(2): 161.

Skull법에 의한 Cubic Zirconia 단결정 성장

김석호, 최종건, 오근호, 조영환¹, 김영준¹, 오봉인¹, 강원호¹

한양대학교 무기재료공학과
¹삼성코닝 주식회사

Single Crystals Growth of Cubic Zirconia by Skull Method

ABSTRACT

Yttria-Stabilized Cubic Zirconia Crystals with Various Y2O3 amounts (6-15mol%) were grown by the Skull melting technique. The modeling of the nucleation at the Skull bottom and the best growth condition were studied. The abrupt changes in generator heating Power and lowering rate of crucible caused the dendritic growth in the grown crystal. The optimum condition of cubic Zirconia single crystals was obtained when the lowering rate was gradually increased. The effect of Y2O3 amounts on the perfection adn the color of the grown crystal were determined. The darkish color generated in the crystals added Y2O3 amounts over 12mol% was eliminated by the annealing in air at 1200$^{circ}C$ for 24hrs.