| Mg4Nb2O9/CaTiO3复合陶瓷的微波介电性能 |
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| 引用本文： | 姚国光,刘鹏.Mg4Nb2O9/CaTiO3复合陶瓷的微波介电性能[J].复合材料学报,2011,28(1):94-98. |
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| 作者姓名： | 姚国光 刘鹏 |
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| 作者单位： | 西安邮电学院理学院;陕西师范大学物理与信息技术学院; |
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| 基金项目： | 陕西省自然科学基金(2009JM6001); 陕西省教育厅项目(09JK729) |
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| 摘 要： | 采用传统固相法制备Mg4Nb2O9/CaTiO3复合陶瓷,研究Li2CO3-V2O5(LV)共掺杂对其烧结特性、微观结构和微波介电性能的影响.实验结果表明:一定量的LV掺杂能够使Mg4Nb2O9/CaTiO3复合陶瓷的烧结温度降至1200℃;XRD和EDX综合分析表明,样品由(Mg4-xCax)Nb2O9/(Ca1-x...
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| 关 键 词： | 复合陶瓷 介电性能 Li2CO3-V2O5 添加 X射线衍射 烧结 |
| 收稿时间： | 2010-02-05 |
| 修稿时间： | 2010-06-20 |
Microwave dielectric properties of Mg_4Nb_2O_9/CaTiO_3 composite ceramics |
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| YAO Guoguang,LIU Peng.Microwave dielectric properties of Mg_4Nb_2O_9/CaTiO_3 composite ceramics[J].Acta Materiae Compositae Sinica,2011,28(1):94-98. |
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| Authors: | YAO Guoguang LIU Peng |
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| Affiliation: | YAO Guoguang1,LIU Peng2(1.School of Science,Xi'an University of Post and Telecommunications,Xi'an 710121,China,2.College of Physics and Information Technology,Shaanxi Normal University,Xi'an 710062,China) |
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| Abstract: | The Mg4Nb2O9-CaTiO3 composite ceramics were synthesised by the conventional solid-state reaction. The effects of Li2CO3-V2O5 (LV) addition on the sintering behavior, microstructure and microwave dielectric properties of Mg4Nb2O9/CaTiO3 ceramics were investigated. It is found that an amount LV co-doped can effectively low the desification sintering temperature to 1200℃ of Mg4Nb2O9/CaTiO3 ceramics. Two-phase system was confirmed by the XRD and EDX spectrum analysis. A near zero temperature coefficient of resonant frequency was obtained. Inparticular, a new Mg4Nb2O9-CaTiO3 ceramics with 1.5% mass fraction of LV doped sintered at 1200℃ for 5h exhibited excellent microwave dieletric properties of ε=23.29, Qf=23460GHz and τf=1.0×10-6℃-1. It is proposed as a candidate subatrate material for GPS microstrip antenna. |
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| Keywords: | composite ceramics dielectric properties Li2CO3-V2O5 additives XRD sintering |
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