SiO_2-AlN复合材料的介电性能—温度特性和频率特性  

Dielectric properties of SiO_2-AlN composites—Temperature dependence and frequency dependence

作　　者：吴洁华[1] 李包顺[1] 李承恩[1] 郭景坤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《功能材料与器件学报》2001年第1期73-76,共4页Journal of Functional Materials and Devices

摘　　要：研究了 SiO2-AlN复合材料介电性能随测试温度和测试频率变化的温度特性和频率特性 , 结果说明 :SiO2-AlN复合材料的极化机理表现为空间电荷极化。介电性能的温度特性说明 1350℃ 下热压烧结的 SiO2-AlN复合材料介电损耗随测试温度基本不变 ,表现了与 SiO2材料相一致的介 电稳定性 ,并基于 Debye弛豫方程作了分析。介电性能的频率特性说明极化弛豫普适关系适用于 SiO2-AlN复合材料。Temperature dependence and frequency dependence of dielectric properties of SiO2-AlN composites were investigated according to the basic dielectric theory. The results showed that the main polarization mechanism of SiO2-AlN composites was space charge polarization. The temperature dependence of dissipation factor showed that dissipation factor of SiO2-AlN composites hot-pressed at 1350℃ was independent of experimental temperature. The frequency dependence showed that SiO2-AlN composites followed the universal relation in the frequency range 10kHz to 3MHz.

关 键 词：SiO2-AlN复合材料 介电性能 温度特性 频率特性 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ174.758[化学工程—陶瓷工业]