硅酸盐学报

SrCO3掺杂对BMT陶瓷结构及介电性能的影响

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。

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.

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

参考文献：

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