J. Korean Ceram. Soc. > Volume 33(1); 1996 > Article
 Journal of the Korean Ceramic Society 1996;33(1): 65.
 $WO_3$ 첨가가 $Zr_{0.8}Sn_{0.2}TiO_4$ 세라믹스의 마이크로파 유전특성에 미치는 영향 이정준, 박종관1 홍익대학교 공과대학 금속·재료공학과1홍익대학교 공과대학 금속·재료공학과 a 오태성 Effects of $WO_3$ Addition on the Microwave Dielectric Properties of $Zr_{0.8}Sn_{0.2}TiO_4$ ABSTRACT Effects of WO3 addition on dielectric constant $varepsilon$r, quality factor Q and $tau$f of Zr0.8Sn0.2TiO4 (ZST) ceramics have been investigated. Up to 0.5 mol% WO3 addition dielectric constant of ZST was about 38 and was not changed with the amount of WO3 addition of WO3. Variation of dielectric constant of ZST with the amount of WO3 dopant showed the almost same behavior as the sintering density. Q value of ZST sintered at 139$0^{circ}C$ for 32 hours could be improved from 6800 to 8500 at 5.5 GHz with addition of 0.5mol% WO3. addition $tau$f of ZST was linearly decreased from 0 ppm/$^{circ}C$ to -4.2 ppm/$^{circ}C$ and then was not change with further addition of WO3 Key words: Microwave dielectrics, $Zr_{0.8}Sn_{0.2}TiO_4$, $WO_3$, dopant
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