| BaO-TiO_2-Nd_2O_3-La_2O_3系陶瓷结构与介电性质研究 |
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| 引用本文： | 张昊,谢道华,向勇,王洪儒,张志萍. BaO-TiO_2-Nd_2O_3-La_2O_3系陶瓷结构与介电性质研究[J]. 电子科技大学学报(社会科学版), 2001, 0(4) |
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| 作者姓名： | 张昊 谢道华 向勇 王洪儒 张志萍 |
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| 作者单位： | 天津大学电子信息工程学院! 天津 300072，天津大学电子信息工程学院! 天津 300072，天津大学电子信息工程学院! 天津 300072，天津大学电子信息工程学院! 天津 300072，天津大学电子信息工程学院! 天津 300072 |
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| 基金项目： | 国防科工委预研基金资助项目 |
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| 摘 要： | 在BaO-TiO2-Nd2O3(BTN)系材料中以La2O3部分取代Nd2O3后构成BaO-TiO_2-Nd_2O_3-La_2O_3(BTNL)系的结构和介电性能。实验结果证实，随着La2O3和Nd2O3摩尔比的增加，介电常数的温度系数((下降，用XRD分析证明是因为BaLa2Ti4O12和La2Ti2O7相的增加所致。在BTNL系中加入适量的添加剂可获得中温下烧结的具有超低损耗的微波陶瓷材料，可用于研制微波独石电容器。
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| 关 键 词： | 晶粒 晶界 主晶相 微波陶瓷 频率特性 |
Structure and Dielectric Properties of BaO-TiO_2-Nd_2O_3-La_2O_3 Ceramic System |
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| Zhang Hao Xie Daohua Xiang Yong Wang Hongru Zhang Zhiping. Structure and Dielectric Properties of BaO-TiO_2-Nd_2O_3-La_2O_3 Ceramic System[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2001, 0(4) |
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| Authors: | Zhang Hao Xie Daohua Xiang Yong Wang Hongru Zhang Zhiping |
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| Abstract: | The structure and dielectric properties of the BaO-TiO_2-Nd_2O_3-La_2O_3(BTNL)system are investigated in this paper. BTNL system is the result of La2O3 partly replacing Nd2O3 in the BaO-TiO2-Nd2O3(BTN) system. By analyzing XRD diffractogram, it is proved that the temperature coefficient (( decreases with the increase of molar ratio of La2O3 and Nd2O3, because of the increase of the crystalline phases of BaLa2Ti4O12 and La2Ti2O7. Adding proper quantities additions into the BTNL system, the microwave ceramic material with ultra low loss can be achieved sintered at middle temperature, which can be used to prepare microwave monolithic capacitor. |
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| Keywords: | crystal grain grain boundary main grain phase microwave ceramic frequency character |
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