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J. Korean Ceram. Soc. > Volume 31(8); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(8): 835.
수산염법에 의한 $Ba_2Ti_9O_{20}$의 합성과 유전특성에 미치는 $ZrO_2$ 첨가의 영향
박재원, 이헌식, 이병하
명지대학교 공과대학 무기재료공학과
Effect of $ZrO_2$ Addition on the Synthesis and Microwave Dielectric Properties of $Ba_2Ti_9O_{20}$ Fabricated by Oxalate method
In this study, the synthesis of Ba2Ti9O20 powder having chemically homogeneous and highly pure fine particle size distribution was attempted by the oxalate method. And the effects of ZrO2 addition was investigated. The four compositions (X=0, 0.028, 0.048, 0.068) of Ba2(Ti9-x, Zrx)O20 were prepared by precipitation reaction of BaCl2, TiCl4, and ZrOCl2, with oxalic acid and NH4OH acting as a precipitating agent and a pH regulator respectively, in aqueous solution. In case of 4.8 mol% ZrO2 addition, the single phase Ba2Ti9O20 was obtained at 120$0^{circ}C$ and its dielectric properties was excellent showing K=40.5, Q=4621 at 5.4 GHz.
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