Effects of B₂O₃ addition on the sintering behavior and microwave dielectric properties of Li₃Mg₂NbO₆ ceramics

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• 作者：Ping Zhang ; Jianwen Liao ; Yonggui Zhao…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：686-690
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

Li₃Mg₂NbO₆ + x wt% B₂O₃ compounds were prepared through conventional solid-state reaction route. The effect of B₂O₃ additives on the sintering characteristics, microstructures and microwave dielectric properties of Li₃Mg₂NbO₆ ceramics have been investigated. We found that doping with the B₂O₃ reduced the sintering temperature and improved the grain growth. The dielectric constant ε_r and the quality factor value Q × f had same variation trend with bulk density. The τ_f values toward the negative direction with the increasing the amount of B₂O₃. Typically, excellent microwave dielectric properties with ε_r = 14.0, Q × f = 67,451 GHz, τ_f = −16.82 ppm/°C were obtained for Li₃Mg₂NbO₆ + 0.1 wt% B₂O₃ ceramics sintered at 925 °C.