| BST-BSL体系的烧结行为和介电性能 |
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| 引用本文： | 李明利,杜丕一,纪松,钱坤明,周宇松. BST-BSL体系的烧结行为和介电性能[J]. 兵器材料科学与工程, 2010, 32(2): 1-4. DOI: 10.3969/j.issn.1004-244X.2010.02.001 |
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| 作者姓名： | 李明利 杜丕一 纪松 钱坤明 周宇松 |
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| 作者单位： | 硅材料国家重点实验室,浙江大学,材料科学与工程系,浙江,杭州,310027;中国兵器科学研究院,宁波分院,浙江,宁波,315103;硅材料国家重点实验室,浙江大学,材料科学与工程系,浙江,杭州,310027;中国兵器科学研究院,宁波分院,浙江,宁波,315103 |
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| 基金项目： | 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) |
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| 摘 要： | 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。
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| 关 键 词： | 钛酸锶钡 复相陶瓷 微观形貌 介电性能 |
Sintering behavior and dielectric property of BST-BSL composite ceramics |
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| LI Mingli,DU Piyi,JI Song,QIAN Kunming,ZHOU Yusong. Sintering behavior and dielectric property of BST-BSL composite ceramics[J]. Ordnance Material Science and Engineering, 2010, 32(2): 1-4. DOI: 10.3969/j.issn.1004-244X.2010.02.001 |
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| Authors: | LI Mingli DU Piyi JI Song QIAN Kunming ZHOU Yusong |
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| Affiliation: | 1.State Key Laboratory of Silicon Materials;Department of Materials Science and Engineering;Zhejiang University;Hangzhou 310027;China;2.Ningbo Branch of China Academy of Ordnance Science;Ningbo 315103;China |
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| Abstract: | The barium strontium titanate(Ba_(0.6)Sr_(0.4)TiO_3,BST)powders with high activity were prepared by oxalate co-precipitation method.The barium strontium titanate composites(BST-BSL)doped by B_2O_3-SiO_2-Li_2O(BSL)were obtained by traditional solid phase method.Their structures and morphology were characterized by XRD and SEM.Experimental results show that the BST-BSL composites can be sintered at below 1 000 ℃.BST-BSL composites possess better permittivity-temperature character.However,the tunability of BST-BSL was decreased to 5%(measured at 1 Kv/mm)due to the nonferroelectric dilution effect of B_2O_3-SiO_2-Li_2O. |
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| Keywords: | strontium barium titanate composite ceramics microstructure dielectric property |
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