Effect of ZnO-WO₃ additives on sintering behavior and microwave dielectric properties of 0.95MgTiO₃-0.05CaTiO₃ ceramics

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• 作者：Wentao Xie ; Hongqing Zhou ; ^{hqzhou@njut.edu.cn" class="auth_mail} ; Haikui Zhu ; Jianxin Zhao ; Guowei Tang ; Xuan Yu
• 关键词：B. Microstructure ; C. Dielectric properties ; Densification
• 刊名：Ceramics International
• 出版年：June, 2014
• 年：2014
• 卷：40
• 期：5
• 页码：6899-6902
• 全文大小：985 K

文摘

The effect of WO₃ addition on the phase formation, the microstructures and the microwave dielectric properties of 1 wt% ZnO doped 0.95MgTiO₃-0.05CaTiO₃ ceramics system were investigated. Formation of second phase MgTi₂O₅ could be effectively restrained through the addition of WO₃, but should be in right amount. WO₃ as additives could not only effectively lower the sintering temperature of the ceramics to 1310 掳C, but also promote the densification. A dielectric constant 蔚_r of 20.02, a Q脳f value of 62,000 (at 7 GHz), and a 蟿_f value of 鈭?.1 ppm/掳C were obtained for 1 wt% ZnO doped 0.95MgTiO₃-0.05CaTiO₃ ceramics with 0.5 wt% WO₃ addition sintered at 1310 掳C.