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J. Korean Ceram. Soc. > Volume 30(12); 1993 > Article
Journal of the Korean Ceramic Society 1993;30(12): 1023.
공침법에 의한 $Ba_2Ti_9O_{20}$ 합성과 $ZrO_2$ 첨가효과에 관한 연구
이병하, 이경희, 이헌식, 전성용
명지대학교 무기재료공학과
A Study on Synthesis of $Ba_2Ti_9O_{20}$ by Coprecipitation Process and the Effect of $ZrO_2$ Addition
ABSTRACT
To obtain a single phase of Ba2Ti9O20 at lower temperature than previious other researches. We investigated the effect of Zr substitution for predetermined portions of Ti in Ba2Ti9O20. In this study, the four compounds(x=0, 0.028, 0.048, 0.068) of Ba2(Ti1-xZrx)9O20 were prepared by coprecipitation reaction of BaCl2, TiCl4 and ZrOCl2 with (NH4)2CO3 and NH4OH as the coprecipitating agents and pH regulators, in queous solution. Owing to 4.8 mol% addition, the single phase of Ba2Ti9O20 showing high Q was obtained at 115$0^{circ}C$ which is lower by 25$0^{circ}C$ than the temperature in case of mechanical mixtures of BaCO3 and TiO2.
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