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0.6Mg_4Nb_2O_9-0.4SrTiO_3复相陶瓷中温烧结和微波介电性能

Middle-temperature Sintering and Dielectric Properties of 0.6Mg_4Nb_2O_9-0.4SrTiO_3 Composite Ceramics
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摘要 采用传统固相反应法制备了0.6Mg4Nb2O9-0.4SrTiO3复合陶瓷。研究了LiF掺杂对其烧结特性、显微组织和微波介电性能的影响。实验结果表明:通过添加一定量的LiF,可将Mg4Nb2O9/SrTiO3陶瓷的致密化烧结温度降至1100℃;其中掺杂1.5wt%LiF、1100℃下烧结5h的0.6Mg4Nb2O9-0.4SrTiO3陶瓷微波介电性能为:ε=20.6,Q·f=4057GHz;样品的微波介电性能与杂相Sr(Ti1-xNbx)O3+δ和残留液相有关。 The 0.6Mg4Nb2O9-0.4SrTiO3 composite ceramics were prepared by the conventional solidstate reaction method.The effects of LiF addition on the sintering behavior,phase composition and microstructure of 0.6Mg4Nb2O9-0.4SrTiO3 specimen were studied.It was found that the densification sintering temperature of 0.6Mg4Nb2O9-0.4SrTiO3 ceramics was significantly lowered from 1300 ℃ to 1100 ℃ with a certain amount of LiF addition.The dielectric properties of the sample with 1.5wt% LiF sintered at 1100 ℃ for 5 h were：ε = 20.6,Q·f = 4057 GHz（at 8.2 GHz）.These properties were correlated with the formation of the second phase Sr（Ti1-xNbx） O3 ＋δ and remnant liquid phase.
作者 刘成 王英 马志军 姚国光 伊兰 邵丽娟 马玉景 王照辉 刘鹏
机构地区 陕西师范大学物理学与信息技术学院 西安邮电学院理学院
出处 《硅酸盐通报》 CAS CSCD 北大核心 2010年第5期1050-1054,共5页 Bulletin of the Chinese Ceramic Society
基金 陕西师范大学勤助科研创新基金项目(QZZD10007) 陕西师范大学实验室开放基金项目(No.09096) 陕西师范大学中央高校基本科研业务费专项资金(2010ZYGX018) 国家自然科学基金项目(No.50872078)
关键词 复合陶瓷 X射线衍射 LiF掺杂 介电性能 composite ceramics XRD LiF-doped dielectric properties
分类号 TM534 [电气工程—电器]
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参考文献17

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硅酸盐通报
2010年 第5期

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