硅酸盐学报

Ba1–xSrxAl2Si2O8 系陶瓷晶体结构及微波介电性能

作者：宋天秀丁士华张瑶张云严欣堪黄龙张晓云

单位：西华大学材料科学与工程学院

关键词：：单斜钡长石六方钡长石晶体结构微波介电性能

分类号：TQ174

出版年,卷(期):页码：2018,46(9):0-0

DOI：10.14062/j.issn.0454-5648.2018.09.02

摘要：

摘要：采用固相反应法制备Ba1–xSrxAl2Si2O8 (x=0，0.050，0.075，0.100，0.150)介质陶瓷。通过热分析、密度、X 射线衍射

和扫描电子显微镜等研究Sr2+对Ba1–xSrxAl2Si2O8 陶瓷的晶体结构及微波介电性能的影响。结果表明：Sr2+可以有效促进六方相

钡长石转变为单斜相钡长石，且当x≥0.075 时，转变率达到100%。在x=0.050 时，六方相与单斜相共存，样品密度ρ 和介电常

数εr 最小。在0.050≤x≤0.100 范围内，随着Sr2+含量的增加，样品密度、介电常数和品质因数Q×f 均增大。在0.050≤x≤0.150

范围内，随着x 值的增大，具有单斜钡长石相样品的谐振频率温度系数向负的方向呈线性发展。Ba0.9Sr0.1Al2Si2O8 在1 425 ℃

烧结时微波介电性能最佳：εr=5.95，Q×f=26 619 GHz，τf=–25.1×10–6 K–1。

基金项目：

作者简介：

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