Composite dielectrics (1 鈭?#xa0;y)(Mg_{1鈭?span style='font-style: italic'>x}Zn_x)_1.8Ti_1.1O₄-yCaTiO₃ suitable for microwave applications

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• 作者：Lingxia Li ; ^{lilingxia@tju.edu.cn} ; Mingming Zhang ; Qingwei Liao ; Wangsuo Xia ; Xiang Ding
• 关键词：(1&#xA0 ; &minus ; &#xA0 ; y)(Mg1&minus ; xZnx)1.8Ti1.1O4&ndash ; yCaTiO3 ; Crystal structure ; Dielectric property ; Microwave application
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：5 August, 2012
• 卷：531
• 期：Complete
• 页码：18-22
• 文件大小：1036 K

摘要

Composite dielectrics, (1 鈭?#xA0;y)(Mg_1鈭?em>xZn_x)_1.8Ti_1.1O₄-yCaTiO₃, were prepared by the conventional solid-state route. The results of the X-ray diffraction and field emission scanning electron microscopy (FESEM) indicated the formation of solid solutions. Microwave dielectric properties of the composites were investigated systematically. For (Mg_1鈭?em>xZn_x)_1.8Ti_1.1O₄ system, superior dielectric properties (蓻_r = 15.03, Q 脳 f = 185,000 GHz, 蟿_f = 鈭?5.1 脳 10^鈭?/掳C) were achieved with (Mg_0.95Zn_0.05)_1.8Ti_1.1O₄ sintered at 1375 掳C. CaTiO₃, as a 蟿_f compensator, was added to form a temperature-stable ceramic system. For (1 鈭?#xA0;y)(Mg_0.95Zn_0.05)_1.8Ti_1.1O₄-yCaTiO₃ system, 0.93(Mg_0.95Zn_0.05)_1.8Ti_1.1O₄-0.07CaTiO₃ ceramic sintered at 1375 掳C had optimal dielectric properties (蓻_r = 18.26, Q 脳 f = 96,000 GHz, 蟿_f = 鈭?.6 脳 10^鈭?/掳C) which satisfied microwave applications in resonators, filters and antenna substrates.