钛酸锶基陶瓷材料中微量物相鉴定  

Identification of A Trace Phase in Strontium-Calcium Titanate Ceramics

作　　者：刘粤惠[1] 陈旭明[1] 连维国[2] 李扬[3] 

机构地区：[1]华南理工大学材料学院无机系,广东广州510641 [2]华南理工大学测试中心,广东广州510641 [3]广州有色金属研究院,广东广州510651

出　　处：《分析测试学报》2002年第6期9-11,共3页Journal of Instrumental Analysis

基　　金：国家863计划资助项目 (980344114)

摘　　要：对具有优良介电性能的高频热补偿多层陶瓷电容器材料 (Sr,Ca)TiO3 系统进行了研究 ;X射线粉末衍射法研究表明当瓷料中钛酸锶烧块 (简称ST)与钛酸钙烧块 (简称CT)摩尔比为nST∶nCT ≈70∶30时 ,主晶相为具有钙钛矿型结构的 (Sr,Ca)TiO3 固溶体 ;微量次晶相为具有钨青铜结构的新化合物铌酸钛钡Ba6Ti2Nb8O30。Crystalline phases in multi - layer ceramic capacitor material based on (Sr0.7 Ca0.3)TiO3, which has excellent dielectric properties for high - frequency thermal compensation, have been studied by XRD and optical mic-roscopy. Under the condition that the molar ratio of strontium titanate(ST) to calcium titanate(CT), i.e. , nST∶nCT, equals to 70∶30, the main crystalline phase was found to be a solid solution of (Sr0.7 Ca0.3)TiO3 with the ABO3 perovskite structure. A new phase of trace amount of Ba6Ti2Nb8O30 with the tungsten bronze structure was also identified. The existence of this trace phase was further verified by orthogonal polarization microscopic and dielectric property studies.

关 键 词：钛酸锶基陶瓷材料 微量物相鉴定 钛酸锶钙 铌酸钛钡 晶体结构 X射线衍射分析 电容器 

分 类 号：TM534.1[电气工程—电器] TQ17[化学工程—硅酸盐工业]