| La3+,Sr2+置换对Ca[(Mg1/3Nb2/3)0.6Ti0.4]O3陶瓷微波介电性能的影响 |
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| 引用本文： | 王浩,陈文,田中青.La3+,Sr2+置换对Ca[(Mg1/3Nb2/3)0.6Ti0.4]O3陶瓷微波介电性能的影响[J].中国稀土学报,2006,24(1):52-55. |
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| 作者姓名： | 王浩 陈文 田中青 |
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| 作者单位： | 1. 武汉理工大学材料科学与工程学院,湖北,武汉,430070
2. 重庆工学院材料科学与工程学院,四川,重庆,400050 |
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| 摘 要： | 研究了La^3＋，Sr^2＋置换对Ca（Mg1/3Nb2/3）0.6Ti0.4]O3陶瓷微观结构与微波介电性能的影响。研究结果表明：La^3＋，Sr^2＋置换改性Ca（Mg1/3Nb2/3）0.6Ti0.4]O3系列陶瓷均形成了单一正交系的钙钛矿结构；随着置换量的增加，La^3＋改性Ca（Mg1/3Nb2/3）0.6Ti0.4]O3陶瓷的介电常数、介电损耗下降，同时谐振频率温度系数向正的方向移动，而Sr^2＋改性陶瓷则表现出相反的规律，其主要原因在于La^3＋，Sr^2＋置换所引起Ca（Mg1/3Nb2/3）0.6TiO4]O3陶瓷内部氧八面体结构变化上的差异。
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| 关 键 词： | 无机非金属材料 钙钛矿 微波介质陶瓷 A位置换 介电性能 稀土 |
| 文章编号： | 1000-4343（2006）01-0052-04 |
| 收稿时间： | 04 29 2005 12:00AM |
| 修稿时间： | 2005-04-292005-06-18 |
Effect of La3+, Sr2+ on Microwave Dielectric Properties of CaO-MgO-Nb2O5-TiO2 System Ceramics |
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| Wang Hao,Chen Wen,Tian Zhongqing.Effect of La3+, Sr2+ on Microwave Dielectric Properties of CaO-MgO-Nb2O5-TiO2 System Ceramics[J].Journal of the Chinese Rare Earth Society,2006,24(1):52-55. |
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| Authors: | Wang Hao Chen Wen Tian Zhongqing |
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| Institution: | 1. Institute of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; 2. Institute of Materials Science and Engineering, Chongqin College of Technology, Chongqing 400050, China |
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| Abstract: | The effect of La~(3+),Sr~(2+) on the microstructure and microwave properties of CaO-MgO-Nb_2O_5-TiO_2 system ceramics was investigated.The result shows that a single complex perovskite structure formed within investigated composition range in La~(3+),Sr_2-doped CaO-MgO-Nb_2O_5-TiO_2 system ceramics.With increasing of La~(3+),Sr~(2+) content,the structure of La~(3+),Sr_2-doped CaO-MgO-Nb_2O_5-TiO_2 system ceramic maintain orthorhombic type.It is found that La~(3+) improves the microwave properties of CaO-MgO-Nb_2O_5-TiO_2 ceramic,but Sr~(2+) does not.The microwave properties of La~(3+),Sr_2-doped CaO-MgO-Nb_2O_5-TiO_2 system ceramics depend on the degree of octahedral distortion inside materials. |
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| Keywords: | inorganic nonmetallic materials perovskite microwave dielectric ceramics dielectric properties rare earths |
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