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溶胶-凝胶法制备Ba0.50Sr0.50TiO3-MgTiO3复合薄膜的介电性能研究

发表时间:2009-11-30  浏览量:1524  下载量:545
全部作者: 高丽娜,翟继卫,姚熹
作者单位: 同济大学功能材料研究所
摘 要: 以具有低介电常数、低损耗的介质材料MgTiO3(MT)为复合相,Ba0.50Sr0.50TiO3(BST)为主相,采用溶胶-凝胶法在Al2O3单晶衬底上制备了Ba0.50Sr0.50TiO3-MgTiO3(BST-MT)复合薄膜,研究了复合薄膜的相结构、显微结构以及在外加电场作用下的介电特性。结果表明:复合薄膜为BST和MT两相共存,MT的引入使得BST-MT复合薄膜同时具有低介电常数、低介电损耗和高材料优值,能很好地满足微波调谐器件用材料的参数要求。
关 键 词: 材料物理与化学;复合薄膜;溶胶-凝胶;调谐率;介电性能
Title: Dielectric properties of Ba0.50Sr0.50TiO3-MgTiO3 composite thin films prepared by sol-gel method
Author: GAO Lina, ZHAI Jiwei, YAO Xi
Organization: Functional Materials Research Laboratory, Tongji University
Abstract: In this work, MgTiO3 (MT) with low dielectric constant and low loss was used as compound phase and Ba0.50Sr0.50TiO3 as prrincipl phase for the fabrication of the Ba0.50Sr0.50TiO3-MgTiO3(BST-MT)composite thin films by sol-gel method. The dielectric properties of the composite thin films were characterized by measuring the dielectric constant and dielectric loss as functions of applied electric field and frequency. As a result, both MT and BST remained as two distinct individual entities in the composite thin films and a considerable reduction in the dielectric loss had been observed. The composite thin films with low dielectric constant and low dielectric loss could be attractive materials for tunable microwave device.
Key words: materials physics and chemistry; composite thin films; sol-gel; tunability; dielectric properties
发表期数: 2009年11月第22期
引用格式: 高丽娜,翟继卫,姚熹. 溶胶-凝胶法制备Ba0.50Sr0.50TiO3-MgTiO3复合薄膜的介电性能研究[J]. 中国科技论文在线精品论文,2009,2(22):2353-2357.
 
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