BST-BSL体系的烧结行为和介电性能Sintering behavior and dielectric property of BST-BSL composite ceramics
李明利;杜丕一;纪松;钱坤明;周宇松;
摘要(Abstract)：
采用草酸盐共沉淀工艺制备高反应活性Ba0.6Sr0.4TiO3(BST)粉体,添加适量的B2O3-SiO2-Li2O(BSL)为烧结助剂,采用传统陶瓷制备工艺制备BST-BSL复相陶瓷。用扫描电镜(SEM)和X射线衍射(XRD)分别研究BST-BSL的微观形貌和相组成,并测试BST-BSL的介电性能参数。结果表明:添加的少量B2O3-Li2O-SiO2在烧结过程中与BST主晶相发生复杂的化学反应,使BST的烧结温度由1 350℃降低到1 000℃以下;B2O3-Li2O-SiO2的添加大幅改善BST的介电常数温度稳定性,引入的非铁电第二相对BST铁电性的‘稀释作用’使BST-BSL的可调率降低,但由于烧结助剂的添加量少,使BST-BSL在1 kV/mm外加偏场下的可调率仍在5%以上。
关键词(KeyWords)： 钛酸锶钡;复相陶瓷;微观形貌;介电性能
基金项目(Foundation): 宁波市自然科学基金项目(2009A610040);; 第46批博士后资助基金项目(20090461406)
作者(Author): 李明利;杜丕一;纪松;钱坤明;周宇松;
Email:
DOI: 10.14024/j.cnki.1004-244x.2010.02.021
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