| Ba1-xSrxTiO3及Ba0.6-xPbxSr0.4TiO3陶瓷的制备和介温特性研究 |
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| 引用本文： | 王梦,贺建龙,杨卫明,吴云翼,李建军,雷强,于军.Ba1-xSrxTiO3及Ba0.6-xPbxSr0.4TiO3陶瓷的制备和介温特性研究[J].物理学报,2010,59(9):6606-6612. |
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| 作者姓名： | 王梦 贺建龙 杨卫明 吴云翼 李建军 雷强 于军 |
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| 作者单位： | 华中科技大学电子科学与技术系,武汉 430074 |
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| 基金项目： | 国家自然科学基金面上项目(批准号:60971008),高等学校博士学科点专项基金(批准号:200804870071) 资助的课题. |
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| 摘 要： | 用固相反应法制备了Ba1-xSrxTiO3(BST)及Ba0.6-xPbxSr0.4TiO3(BPST)陶瓷,通过XRD,FESEM和拉曼谱分析了Pb掺杂对Ba0.6Sr0.4TiO3样品的晶格、相变及表面形貌的影响.测试了BST及B
关键词：
BST
BPST
弥散相
介温特性
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| 关 键 词： | BST BPST 弥散相 介温特性 |
| 收稿时间： | 9/3/2009 12:00:00 AM |
| 修稿时间： | 1/8/2010 12:00:00 AM |
Synthesis and temperature dependence of permittivity of Ba1-x Srx TiO3 and Ba0.6-x Pbx Sr0.4 TiO3 ceramics |
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| Wang Meng,He Jian-Long,Yang Wei-Ming,Wu Yun-Yi,Li Jian-Jun,Lei Qiang,Yu Jun.Synthesis and temperature dependence of permittivity of Ba1-x Srx TiO3 and Ba0.6-x Pbx Sr0.4 TiO3 ceramics[J].Acta Physica Sinica,2010,59(9):6606-6612. |
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| Authors: | Wang Meng He Jian-Long Yang Wei-Ming Wu Yun-Yi Li Jian-Jun Lei Qiang Yu Jun |
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| Institution: | Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Ba1-xSrxTiO3 (BST) and Ba0.6-xPbxSr0.4TiO3 (BPST) ceramics were prepared by conventional solid-state reaction method. The analysis of XRD, FESEM and Raman spectroscopy showed the effects of Pb-doping on the crystal lattice,phase transition and surface morphology of Ba0.6Sr0.4TiO3, respectively. And the temperature dependence of permittivity (ε-T properties)for all ceramics were measured at a frequency of 10 kHz. The mechanism that Curie temperature and the peak value of permittivity are modulated by Sr and Pb content in BST and BPST perovskite has been revealed. In addition, all samples exhibit a diffused phase transition (DPT), especially for the ceramic Ba0.5Pb0.4Sr0.1TiO3, which can improve its temperature stability of tunability as phase shifter than others. Some ferroelectric parameters are calculated to interpret the DPT by adopting Smolenski’s theory and Curie-Wise law. For example, the values of diffuseness exponent α,Curie constant and transition region have changed from 1.29 to 1.73, from 1.25×105 to 2.87×105 K, and from 13.2 ℃ to 22.3 ℃, respectively. |
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| Keywords: | BST BPST |
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