K、Mg对Sr-Bi-Ti系介质陶瓷材料改性的研究  

Study on Improving Dielctric Properties in the Sr-Bi-Ti System Ceramic by Adding K、 Mg

作　　者：金放鸣[1] 郑家范 游恩溥[1] 

机构地区：[1]西北轻工业学院

出　　处：《硅酸盐通报》1993年第3期10-15,共6页Bulletin of the Chinese Ceramic Society

摘　　要：本文研究了在Sr-Bi-Ti系统中引入K和MgO后,对材料性能的影响。初步研制成一种介电常数大、介质损耗小,温度特性好,适合制造陶瓷高压电容器的介质材料。应用X光衍射仪、电子显微镜、能谱色散X射线谱仪等分析手段,对典型试样的晶体结构和显微结构进行了研究。The K is added to the Sr-Bi-Ti system to improve dielectric behavior, and it is found thatfine-grained ceramics can be obtained by adding MgO to Sr-Bi-K-Ti system. The dielectric mate-rial with a high dielectric constant, good temperature characterities and low dielectric loss is devel-oped for high-voltage ceramic capacitor. Microstruture of specimens is studied by X-ray diffraction, SEM and EDAX analysis. The re-sults show that the dielectric material consists of main crystalline phasc strontium titante solid solu-tion and secondary crystalline phase Mg Ti_2O_5. The former has high dielectric constant, the latteracts as grain growth inhibition.

关 键 词：陶瓷电容器 介电性能 钙钛矿 结构 

分 类 号：TM534.1[电气工程—电器]