| (Sr,Ca)TiO3陶瓷材料的结构与介电性能 |
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| 引用本文： | 刘粤惠,陈旭明. (Sr,Ca)TiO3陶瓷材料的结构与介电性能[J]. 无机材料学报, 2003, 18(2): 325 |
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| 作者姓名： | 刘粤惠 陈旭明 |
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| 作者单位： | 华南理工大学材料学院 广州 510641 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 研究(Sr,Ca)TiO3系统陶瓷材料的组成、结构与介电性能关系.当ST/CT比值约为7:3时,主晶相(Sr0.7Ca0.3)TiO3形成完全互溶钙钛矿型固溶体,具有立方顺电相结构;系统中微量钨青铜型新化合物铌酸钛钡BTN对主晶相(Sr0.7Ca0.3)TiO3的介电性能起进一步的改善作用.获得具有理想介电性能(ε(20℃1MHZ)>250,αc(-55～+125℃)=-1150ppm/℃,tgδ(20℃1MHZ)<5×10-4,ρv(20℃100VDC)>1013Ω·cm)、不含Pb、Bi的Q组MLC瓷料.
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| 关 键 词： | 钛酸锶钙 铌酸钛钡 结构 介电性能 |
| 收稿时间： | 2002-02-06 |
| 修稿时间： | 2002-04-11 |
Structure and Dielectric Properties of (Sr,Ca)TiO3 Ceramics |
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| LIU Yue-Hui,CHEN Xu-Ming. Structure and Dielectric Properties of (Sr,Ca)TiO3 Ceramics[J]. Journal of Inorganic Materials, 2003, 18(2): 325 |
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| Authors: | LIU Yue-Hui CHEN Xu-Ming |
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| Affiliation: | Material College; South China University of Technology; Guangzou 510641; China |
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| Abstract: | The phase component, structure and dielectric properties of (Sr,Ca)TiO3 systems were studied. When ST/CT ratio is 7:3, a main crystalline phase (Sr0.7Ca0.3)TiO3 complete solid solution with the ABO_3 perovskite structure is formed, the dielectric properties are improved by a microscale next crystalline phase BNT(Ba6Ti2Nb8O30) with the tungsten bronze structure in the system. The new ceramic materials with excellent dielectric properties (ε(20℃ 1MHZ)≥250, αc(-55～+125℃)=-1150ppm/℃, tgδ(20℃ 1MHZ)<5×10-4, ρv(20℃ 100VDC)≥1013Ω·cm) do not contain lead or bismuth , and can be used for Q group multilayer ceramic capacitors. |
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| Keywords: | strontium-calcium titante barium titanium niobate structure dielectric properties |
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