硅酸盐学报

Bi4B2O9对Ca0.2Sr0.05Li0.375Sm0.375TiO3陶瓷烧结和微波介电性能的影响

单位：1.桂林电子科技大学材料科学与工程学院桂林 541004 2.中南大学材料科学与工程学院长沙410083

分类号：TQ 12

出版年,卷(期):页码：2014,42(12):0-0

DOI：

摘要：

采用传统固相法制备(Ca0.2Sr0.05Li0.375Sm0.375)TiO3钙钛矿微波介质陶瓷，研究了Bi4B2O9对(Ca0.2Sr0.05Li0.375Sm0.375)TiO3陶瓷微波介电性能的影响，利用X射线衍射仪、扫瞄电子显微镜和矢量网络分析仪对其晶体结构、显微组织和微波介电性能进行了研究。结果表明：掺10%的Bi4B2O9的(Ca0.2Sr0.05Li0.375Sm0.375)TiO3陶瓷，其烧结温度由1 300 ℃降至1 080 ℃。当添加3.5%的Bi4B2O9时，其最佳烧结温度为1 150 ℃，陶瓷的微波介电性能最佳(相对介电常数εr=116.9；品质因数Q×f =3 500 GHz；频率温度系数τf =1.2×10-6/℃)。

(Ca0.2Sr0.05Li0.375Sm0.375)TiO3 perovskite ceramics were prepared by a traditional solid-state reactions method. The effects of Bi4B2O9 additions on microwave dielectric properties of (Ca0.2Sr0.05Li0.375Sm0.375)TiO3 system were studied. The crystal structures, micro-structure and the microwave dielectric properties of (Ca0.2Sr0.05Li0.375Sm0.375)TiO3 ceramics were investigated by the X-ray diffraction, scanning electron microscope and network analyzer. The results revealed that 10% addition of Bi4B2O9 would lower the sintering temperature of (Ca0.2Sr0.05Li0.375Sm0.375)TiO3 perovskite ceramic from 1 300 to 1 080 ℃. The 3.5% addition of Bi4B2O9 ceramic which sintered at 1 150 ℃had the best microwave dielectric properties: relative dielectric constant εr = 116.9, quality factor Q×f = 3 500 GHz and frequency temperature coefficient τf = 1.2×10-6/℃.

基金项目：

基金项目：国家大学生创新训练项目(201310595018)；广西大学生创新训练计划(201410595087)；广西信息材料重点实验室研究基金(1210908-209-Z, 1210908-05-Z, 1210908-207-Z)资助。

作者简介：

第一作者：刘飞(29—)，男，博士研究生。通信作者：袁昌来(36—)，男，副教授。

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