硅酸盐学报

氧化铈复合钛酸镧钙介质陶瓷的微波性能

作者：钱俊胡明哲顾豪爽

单位：湖北大学物理与电子技术学院湖北大学物理与电子技术学院湖北大学材料物理与化学省级重点实验室武汉430062

分类号：TQ174.1

出版年,卷(期):页码：2007,35(1):41-45

DOI：

摘要：

以1%(质量分数)CuO为烧结助剂,采用固相合成法制备了(1–x)Ca0.6La0.27TiO3+xCeO2单纯和复合微波介质陶瓷材料。研究了此体系陶瓷的微观结构和微波介电性能。研究表明:当x从0增加到1时,体系的相对介电常数εr从111.2线性降低到22.5;谐振频率温度系数τf从x=0时的正值+297.8×10–6/℃线性变化为x=1的负值–54.2×10–6/℃;而无载品质因数与谐振频率乘积Qf值则呈非线性增加。当x=0.85,且在1400℃烧结,可获得εr=32.2,Qf=6682GHz,τf=+5×10–6/℃的新型微波介质陶瓷。

Simple and complex microwave dielectric ceramics of (1–x)Ca0.6La0.27TiO3+xCeO2 were prepared by conventional solid-state reaction method with 1% in mass CuO as a sintering additive. The microstructures and microwave dielectric properties of the serial ceramics were investigated. The results show that the dielectric constant εr decreases linearly from 111.2 to 22.5 as the x value increases from 0 to 1 and the temperature coefficient of resonance frequency τf also varies linearly from a positive value of +297.8×10–6/℃ at x=0 to a negative value of ?54.2×10–6/℃ at x=1. Also, as the x value increased, the product of unloaded quality factor and resonance frequency Qf of the ceramics increased nonlinearly. When the ceramics with x=0.85 were sintered at 1 400 ℃, it had a relative dielectric constant εr of 32.2, a Qf value of 6 682 GHz and a near zero τf value of 5×10–6/℃.

基金项目：

国家自然科学基金(50572026);; 湖北省教育厅(030094105)资助项目。

作者简介：

参考文献：

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