<TEX>$SrTiO_3$</TEX> Single Crystal Growth by Verneuil Method

,; ,; ,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 29(9); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(9): 689.

Verneuil법에 의한 $SrTiO_3$ 단결정 성장

최익서, 조현, 최종건, 오근호

한양대학교 무기재료공학과

$SrTiO_3$ Single Crystal Growth by Verneuil Method

ABSTRACT

Strontium Titanate single crystal is grown by Verneuil method. Feed materials were prepared by coprecipitation method which started with Sr(NO3)2 and TiCl4. SrTiO3 can not be grown from feed materials having the stoichiometric components due to volatilization of SrO, when the powder added more 3 wt% SrO used, the crystal can be grown. Growth conditions that the pressure of oxygen and hydrogen gas was 5 psi, the flow rate of oxygen and hydrogen was 7.3 and 30ι/min respectively, the growth rate was 20 mm/hr were optimum. The grown single crystal has the diameter of 10~15 mm and its length is 30~40 mm. The grown crystal was deep brown color and somewhat transparent. The color of grown crystal was lightened after annealing.