Effect of H₃BO₃ on the low temperature sintering and microwave dielectric properties of Li₂ZnTi₃O₈ ceramics

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• 作者：Ping Zhang ; ^{zhangpingtju@163.com} ; Yanbo Hua ; Wangsuo Xia ; Lingxia Li
• 关键词：Ceramics ; Dielectric properties ; Microstructure ; Sintering
• 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 September, 2012
• 卷：534
• 期：Complete
• 页码：9-12
• 文件大小：581 K

摘要

The effects of H₃BO₃ addition on the sintering temperature, microstructure and microwave dielectric properties of Li₂ZnTi₃O₈ ceramics were investigated. With H₃BO₃ addition, the densification of Li₂ZnTi₃O₈ ceramics was improved significantly, the sintering temperature was lowered effectively, and the 蟿_f was adjusted to shift toward zero direction. In the case of 1.0 wt.%H₃BO₃ addition, the value of 蔚_r and Q 脳 f reached maximum. With further H₃BO₃ addition, the dielectric properties were degraded due to the inferior microstructure. With 1.0 wt.%H₃BO₃, the Li₂ZnTi₃O₈ ceramics sintered at 880 掳C for 4 h showed excellent microwave dielectric properties of 蔚_r = 25.9, Q 脳 f = 50,200 GHz, and 蟿_f = 鈭?.8 ppm/掳C.