| 中温烧结Mg_4Nb_2O_9-CaTiO_3陶瓷相结构的研究 |
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| 引用本文： | 姚国光,田秀劳.中温烧结Mg_4Nb_2O_9-CaTiO_3陶瓷相结构的研究[J].西安邮电学院学报,2008,13(5):5-7. |
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| 作者姓名： | 姚国光 田秀劳 |
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| 作者单位： | 西安邮电学院,应用数理系,陕西,西安,710121 |
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| 摘 要： | 采用传统固态反应方法制备了(1-x)Mg4Nb2O9+xCaTiO3(1-x)MN-xCT]复合陶瓷。探讨了烧结温度、组分x对Mg4Nb2O9/CaTiO3复合材料相结构的影响。通过XRD和EDS进行物相分析。实验结果表明:V2O5添加能够有效降低Mg4Nb2O9/CaTiO3陶瓷的烧结温度;(1-x)MN-xCT复相的形成主要取决于烧结温度和x的含量。1150℃烧结、0.5≤x≤0.7范围内,形成了Mg4Nb2O9/CaTiO3复相,无新相生成,但元素在不同相之间发生了扩散。
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| 关 键 词： | 复合材料 介质陶瓷 XRD |
Phase evolution of Mg4Nb2O9/CaTiO3 ceramics sintered at middle-temperature |
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| YAO Guo-guang,TIAN Xiu-lao.Phase evolution of Mg4Nb2O9/CaTiO3 ceramics sintered at middle-temperature[J].Journal of Xi'an Institute of Posts and Telecommunications,2008,13(5):5-7. |
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| Authors: | YAO Guo-guang TIAN Xiu-lao |
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| Affiliation: | (Department of Applied Mathematics and Physics, Xi＇an University of Post and Telecommunications, Xi＇an 710021, China) |
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| Abstract: | The microwave dielectric materials of Mg4Nb2O9 and CaTiO3 with various compositions are prepared by conventional solid-state reaction method. The effects of composition x and sintering temperature on the crystal phase are studied. The crystal phases of the sintered samples are characterized by XRD and EDS respectively. It is found that the V2O5 addition can lower the sintering temperature of Mg4Nb2O9/CaTiO3 ceramics drastically, the formation of multiphase of （1-x）MN - xCT depended on both composition x and sintering temperature. Mg4Nb2O9 and CaTiO3 structure were kept and no new phases were formed for Mg4Nb2O9/CaTiO3 ceramics with 0.5≤x≤0.7, sintered at 1150℃. However, element diffusion occurred between Mg4Nb2O9 and CaTiO3. |
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| Keywords: | composite material dielectric ceramics XRD |
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