Low-temperature synthesis and microwave dielectric properties of trirutile-structure MgTa₂O₆ ceramics by aqueous sol-gel process

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• 作者：H.T. Wu^a ; ^{mse_wuht@ujn.edu.cn} ; Y.S. Jiang^b ; Y.L. Yue^a
• 关键词：A. Sol&ndash ; gel process ; MgTa2O6 ; Nanopowder synthesis ; Microwave dielectric properties
• 刊名：Ceramics International
• 出版年：2012
• 期刊代码：13_02728842
• 类别：ms
• 出版时间：August, 2012
• 卷：38
• 期：6
• 页码：5151-5156
• 文件大小：1053 K

摘要

Trirutile-structure MgTa₂O₆ ceramics were prepared by aqueous sol-gel method and microwave dielectric properties were investigated. Highly reactive nanosized MgTa₂O₆ powders were successfully synthesized at 500 掳C in oxygen atmosphere with particle sizes of 20-40 nm. The evolution of phase formation was detected by DTA-TG and XRD. Sintering characteristic and microwave dielectric properties of MgTa₂O₆ ceramics were studied at different temperatures ranging from 1100 to 1300 掳C. With the increase of sintering temperature, density, 蓻_r and Q 路 f values increased and saturated at 1200 掳C with excellent microwave properties of 蓻_r 鈭?#xA0;30.1, Q 路 f 鈭?#xA0;57,300 GHz and 蟿_f 鈭?#xA0;29 ppm/掳C. The sintering temperature of MgTa₂O₆ ceramics was significantly reduced by aqueous sol-gel process compared to conventional solid-state method.