(Pb_(0.5)Sr_(0.5))TiO_3粉体与薄膜的合成、结构与电性能研究(英文)  

Synthesis, Phase Formation and Dielectric Properties of (Pb_(0.5)Sr_(0.5))TiO_3 Powders and Thin Films

作　　者：程铁栋[1] 唐新桂[1] 匡淑娟[1] 丁南[1] 刘秋香[1] 

机构地区：[1]广东工业大学,广东广州510006

出　　处：《稀有金属材料与工程》2010年第S2期65-68,共4页Rare Metal Materials and Engineering

基　　金：The National Natural Science Foundation of China (10774030);the Guangdong Provincial Natural Science Foundation of China (8151009001000003)

摘　　要：使用溶胶凝胶法合成(Pb0.50Sr0.50)TiO3(缩写为PST)粉体和薄膜。用X射线衍射(XRD)和扫面电镜(SEM)观察PST粉体的相形成和形貌特征。结果表明,800℃退火处理的凝胶样品还有中间相碳酸盐存在;850℃退火的干凝胶样品,晶化完成后为多晶钙钛矿结构,而650℃经快速热处理的薄膜样品为多晶结构,平均晶粒尺寸为60nm。PST薄膜在100kHz频率测量情况下,介电常数与损耗分别为561.5和0.022。(Pb0.50Sr0.50)TiO3 (PST) powders and thin films were prepared by a sol-gel method. X-ray diffraction (XRD) and scan electron microscopy (SEM) were employed to observe the formation of phases and morphology of powders. From XRD patterns, an intermediate phase of carbonate decomposed above 800 ℃ was observed. In the present work, well-crystallized, polycrystalline perovskite PST powders with uniform particles were obtained from PST dry gel annealed at 850 ℃ for 1 h. PST thin film annealed at 650 ℃ by a rapid thermal annealing showed a polycrystalline structure and an average grain size of 60 nm. The dielectric constant and loss tanδ of PST thin films were 561.5 and 0.022, respectively at 100 kHz.

关 键 词：(Pb0.50Sr0.50)TiO3 溶胶-凝胶 粉体 薄膜 铁电性 介电特性 

分 类 号：TB383.3[一般工业技术—材料科学与工程] TB383.2