摘要：采用溶胶凝胶法制备了纳米Ba_1-x Sr_xTiO₃铁电陶瓷粉体，并用 红外—热重联用的方法，结合 SEM 和 XRD 实验结果，分析了前驱粉体 的热分解产物及其中的化学过程。XRD 和 SEM 测试结果表明，干凝胶 在空气中800 ℃下保温2h得到纯钙钛矿结构的BST纳米晶粉体，晶粒 尺寸大约为 30nm。 

关键词：溶胶—凝胶法；纳米材料；热分解

Abstract: Ba_1-x Sr_xTiO₃ ferroelectric ceramics is prepared by sol—gel method. Using the TGA—FTIR analysis, and the results from SEM and XRD experiments, the substances produced in the thermal decomposition of precursor powder, as well as the chemical reactions invloved in this process are analysed.As the results from the XRD and SEM meansurement, the dry gel is kept in the open air at the temperature of 800 ℃ for 2 h, then the nanometer peroviskite structured BST crystal is obtained, which is approximately 30 nm in size. 

Keywords: sol—gel method; nanometer materials; thermal decomposition