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SrCO3掺杂对BMT陶瓷结构及介电性能的影响
作者:彭森1 2 吴孟强2 肖勇2 许建明1 刘轶2 陈黎2 张树人2 
单位:1. 邵阳学院信息工程系 湖南 邵阳 422000 2. 电子科技大学 电子薄膜与集成器件国家重点实验室 成都 610054 
关键词:微波介质陶瓷 烧结性 掺杂 介电性能 
分类号:TM277
出版年,卷(期):页码:2011,39(12):67-72
DOI:
摘要:

采用固相烧结法制备SrCO3掺杂Ba(Mg1/3Ta2/3)O3(BMT)微波介质陶瓷,研究SrCO3质量(下同)掺量w(SrCO3) = 2%~8%对BMT微波介质陶瓷结构和介电性能的影响。结果表明:添加适量SrCO3可以促进烧结并在一定程度上提高BMT陶瓷体系的B位离子1:2有序度;当w(SrCO3) = 6%时,陶瓷致密化烧结温度由纯相时的1 650 ℃以上降至1 500 ℃,体积密度ρV = 7.534 g/cm3,相对密度达到98.7%,此时陶瓷体系获得良好的微波介电性能:相对介电常数εr = 24.5,品质因数与谐振频率的乘积Q· f = 99 000 GHz (8 GHz),谐振频率温度系数τf = 9.6 × 10–6 ℃–1。

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Microwave dielectric ceramics of SrCO3 doped Ba(Mg1/3Ta2/3)O3 (BMT) were prepared using solid state reaction. Effects of SrCO3 on structure and microwave dielectric properties of BMT ceramic were investigated as a function of SrCO3 mass fraction (the same below) from 2% to 8%. It is found that sinterability of the BMT can be improved greatly and B-site ordering degree increases to a certain extent with adding the appropriate amount of SrCO3. In comparison with pure BMT ceramics, the BMT ceramic doped with 6% SrCO3 shows a lower sintering temperature decreasing from 1 650 ℃ to1 500 ℃. Its bulk density ρV = 7.534 g/cm3, and relative density is 98.7%. The BMT demonstrates the best microwave dielectric properties: relative dielectric constant εr = 24.5, quality factor plus resonant frequency Q· f = 99 000 GHz (8 GHz,), and temperature coefficient of resonant frequency τf = 9.6 × 10–6 ℃–1.

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基金项目:
湖南省教育厅基金(09C886)资助项目
作者简介:
彭森(1983—),男,硕士,助教
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参考文献:

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