Structure, Phase Evolution, and Microwave Dielectric Properties of (Ag0.5Bi0.5)(Mo0.5W0.5)O4 Ceramic with Ultralow Sintering Temperature

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• 作者：Di Zhou ; Wen-Bo Li ; Jing Guo ; Li-Xia Pang ; Ze-Ming Qi ; Tao Shao ; Hui-Dong Xie ; Zhen-Xing Yue ; Xi Yao
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：June 2, 2014
• 年：2014
• 卷：53
• 期：11
• 页码：5712-5716
• 全文大小：352K
• 年卷期：v.53,no.11(June 2, 2014)
• ISSN：1520-510X

文摘

In the present work, the microwave dielectric ceramic (Ag_0.5Bi_0.5)(Mo_0.5W_0.5)O₄ was prepared by using the solid-state reaction method. (Ag_0.5Bi_0.5)(Mo_0.5W_0.5)O₄ was found to crystallize in the scheelite structure, in which Ag⁺ and Bi³⁺ occupy the A site randomly with 8-coordination while Mo⁶⁺ and W⁶⁺ occupy the B site with 4-coordination, at a sintering temperature above 500 掳C, with lattice parameters a = b = 5.29469(2) 脜 and c = 11.62114(0) 脜, space group I4₁/a (No. 88), and acceptable R_p = 9.38, R_wp = 11.2, and R_exp = 5.86. High-performance microwave dielectric properties, with permittivity 26.3, Q_f value 10000 GHz, and temperature coefficient +20 ppm/掳C, were obtained in the sample sintered at 580 掳C. Its chemical compatibility with aluminum at its sintering temperature was revealed and confirmed by both X-ray and energy dispersive spectrometer analysis. This ceramic could be a good candidate for ultralow-temperature cofired ceramics.