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J. Korean Ceram. Soc. > Volume 23(6); 1986 > Article
Journal of the Korean Ceramic Society 1986;23(6): 45.
$SrTiO_3$ 습식 직접 합성 반응기구에 관한 연구
이경희, 이병하, 김대웅1
명지대학교 공과대학 요업공학과
1고려화학(주) 중앙연구소
Reaction Mechanism on the Synthesis of $SrTiO_3$ by Direct Wet Process
$SrTiO_3$ reaction mechanism formed from $TiCl_4$ and $SrCl_2$ solution by direct-wet-process was studied. Through this study it is identified that crystalline $SrTiO_3$ is formed above pH 13.8 amorphous $SrTiO_3$ above pH7 and crystallization temperature of amorphous $SrTiO_3$ is at 37$0^{circ}C$. the final products are composed of 60% crystalline $SrTiO_3$ and 40% amorphous $SrTiO_3$ The amorphous $SrTiO_3$ is identified with the IR absorption spectrum of Sr-Ti-O by FT-IR spectrometer. Under pH 7 gelationus metatitanate (H2TiO3) is formed from TiCl4 but above pH7 the activity by the formation of metatitnic acid ion $[TiO_3]^{2-}$ is so high that $SrTiO_3$is formed more easily through the reaction with $Sr^{2+}$
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