溶胶-凝胶法制备BST/MgO陶瓷及其介电性能  

Fabricating BST/MgO Ceramics by Sol-Gel and Its Dielectric Properties

作　　者：刘秀兰[1] 杨觉明[1] 范琳[1] 

机构地区：[1]西安工业大学材料与化工学院,西安710032

出　　处：《西安工业大学学报》2008年第6期548-551,共4页Journal of Xi’an Technological University

摘　　要：为获得致密细晶、介电性能优良的BST/MgO陶瓷,采用溶胶-凝胶法制备包裹MgO粉体的BST凝胶.凝胶预烧温度为750℃,粉体烧结工艺为1300℃保温2 h.实验结果表明该方法制备出的BST/MgO陶瓷包含BST和MgO两相,无任何杂相,陶瓷晶粒生长完整且均匀,气孔呈现圆形,相对密度达92.4%,具有良好的介电性能.To get BST/MgO ceramics with high-density, fine-grain and excellent dielectric properties, the BST gel enwrapping MgO powder has been prepared by Sol- Gel method. The presintering temperature is 750℃, the proper sintering process is 1 300℃ for 2 hour The results show that phases of the ceramics comprise BST and MgO, the ceramic grains grow ideally, and pores exist as circle, the relative density is 92. 4%,the dielectric constant and loss tangents of BST/MgO ceramics are the best.

关 键 词：溶胶-凝胶法 钛酸锶钡 陶瓷 介电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]