Preparations of <TEX>$(Zr_{0.08}Sn_{0.2})TiO_4$</TEX> Dielectric Powders by Coprecipitation of <TEX>$(Zr^{4+}, Ti^{4+})-Hydroxides in the Presence of SnO2 Particles

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J. Korean Ceram. Soc. > Volume 31(11); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(11): 1293.

부분 공침법에 의한 $(Zr_{0.08}Sn_{0.2})TiO_4$ 분말합성 및 유전특성

임경란, 장진욱¹

한국과학기술연구원 세라믹스연구부
¹서울대학교 무기재료공학과

Preparations of $(Zr_{0.08}Sn_{0.2})TiO_4$ Dielectric Powders by Coprecipitation of $(Zr^{4+}, Ti^{4+})-Hydroxides in the Presence of SnO2 Particles

ABSTRACT

(Zr, Sn)TiO4 powders were prepared in 0.05~0.13 ${mu}{textrm}{m}$ by coprecipitating (Zr4+, Ti4+)hydroxide on SnO2 particles and followed by calcination at 90$0^{circ}C$ for 2 h. They sinter to 95% of relative density at 140$0^{circ}C$ for 2 h. and shows dielectric constant, $varepsilon$r=37.5 and quality factor, Qxf(GHz)=46,000. With 3 mol% of ZnO it sinters to rel=97.5%, $varepsilon$r=39 and Qxf(GHz)=40,050 at 135$0^{circ}C$ for 2 h., but raising sintering temperature to 140$0^{circ}C$ deteriorates quality factor, relative density and microstructure with developing second phase.