微波低温快速合成BST纳米粉体  

Preparation of BST nanopowders by microwave-low temperature processing

作　　者：陈杰[1] 

机构地区：[1]西安科技大学材料科学与工程系,陕西西安710054

出　　处：《功能材料》2007年第A02期688-690,共3页Journal of Functional Materials

基　　金：教育部“新世纪优秀人才资助计划”资助项目（NCET-04-0971）.

摘　　要：以BaCl2、TICl4为原料，以NaOH为沉淀剂，利用微波加热技术在低温下快速制备出了Ba0.8Sr0.2TiO3纳米粉体．应用XRD、TEM、XRF等对粉体的结构、形貌进行了分析．研究表明，在80℃左右，5～10min内即制备出颗粒大小分布均匀、粒径在50nm的高纯BST纳米粉体，该方法合成粉体属于立方相钙钛矿晶体结构，粒子形状近似为球形．粉体的杂质含量小于电子工业行业标准；粉体经过干压成型后在1180℃烧结，所得钛酸钡陶瓷的相对密度达到96．3％．The synthesis of barium strontium titanate （Ba0.8Sr0.2TiO3） nanopowders has been investigated under microwave-low temperature conditions in the temperature 80℃ using BaCl2, and TiCI4 as Ba and Ti sources, and NaOH as the precipitant, respectively. The crystallized products were characterized by powder X-ray diffraction （XRD）, transmission electron microscopy（TEM）, X-ray fluorescence （XRF） . The experimental results showed that the prepared BST nanopowders with higher purity and particle sizes of 50 nm and almost spherical particle shape by the microwave-low temperature process are cubic phase, however, the microwave-low temperature synthesis route is rapid（only 5～10min）. the content of impurity was below the industry standard. The powder could be sintered to a relative density of 96,3% when sintered at 1180℃.

关 键 词：纳米粉 BST 微波低温制备 立方相 

分 类 号：TM282[一般工业技术—材料科学与工程]