Microstructures and Optical Properties of Sol-gel Derived Ba_(0.9)Sr_(0.1)TiO_3 Thin Films Formed by Different Annealing Process  

作　　者：洪学鹍 HOU Haihong ZHANG Debao 

机构地区：[1]College of Physics and Electronic Engineering,Changshu Institute of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第6期1020-1023,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.61106126)

摘　　要：We investigated the effect of annealing process on microstructures and optical properties of the sol-gel derived Ba0.9Sr0.1TiO3 （BST） films. The BST films, fabricated by layer-by-layer high-temperature （≥ 650 ℃） annealing process, had laminated structures consisting of alternating dense and porous BST layers, and exhibited excellent optical performance as Bragg reflectors. The Bragg reflection characteristic can be enhanced with increasing annealing temperature. Those BST films fabricated at temperatures lower than 650 ℃ displayed uniform cross-sectional morphologies even treated at a higher temperature. The difference in the microstructures of the BST thin films was also discussed.We investigated the effect of annealing process on microstructures and optical properties of the sol-gel derived Ba0.9Sr0.1TiO3 （BST） films. The BST films, fabricated by layer-by-layer high-temperature （≥ 650 ℃） annealing process, had laminated structures consisting of alternating dense and porous BST layers, and exhibited excellent optical performance as Bragg reflectors. The Bragg reflection characteristic can be enhanced with increasing annealing temperature. Those BST films fabricated at temperatures lower than 650 ℃ displayed uniform cross-sectional morphologies even treated at a higher temperature. The difference in the microstructures of the BST thin films was also discussed.

关 键 词：annealing process BST films MICROSTRUCTURES optical properties 

分 类 号：TB383.2[一般工业技术—材料科学与工程]