(Mg_(0.95)Ca_(0.05))TiO_3晶体的激光加热基座法生长及其性质测定  

Growth and properties of (Mg0.95Ca0.05)TiO3 crystals grown by laser heated pedestal growth technique

作　　者：蒋毅坚[1] R.Guo A.S.Bhalla 

机构地区：[1]北京工业大学国家产学研激光技术中心,北京100022 [2]宾夕法尼亚州立大学材料研究实验室

出　　处：《功能材料》2003年第2期158-159,共2页Journal of Functional Materials

摘　　要：采用激光加热基座法(LHPG)生长出了共晶系(Mg0.95Ca0.05)TiO3晶体。通过粉末X射线衍射分析了所生长晶体的晶相,采用扫描电镜和显微拉曼光谱技术研究了所生长晶体的微观结构。(Mg0.95Ca0.05)TiO3晶体由CaTiO3和Mg-TiO3两种晶体复合而成。介电测量结果表明:(Mg0.95Ca0.05)TiO3晶体沿生长方向具有较大的介电常数和较小的共振频率温度系数。Crystals of (Mg0.95Ca0.05) TiO3 eutectic system have been grown by using laser heated pedestal growth (LHPG) technique. The grown crystals were characterized by X-ray powder diffraction, SEM and micro-Raman spectroscopy. In (Mg0.95Ca0.05) TiO3 crystal, CaTiO3 exist in MgTiO3 matrix. The dielectric measurement shows that along the growth direction, (Mg0.95Ca0.05) TiO3 crystals have higher dielectric constant and lower temperature coefficient of resonant frequency than along other directions.

关 键 词：激光加热基座法 共晶 介电性质 晶体生长 粉末X射线衍射 微波介电材料 

分 类 号：TM21[一般工业技术—材料科学与工程] O782[电气工程—电工理论与新技术]