| La2O3掺杂BST/Mg2TiO4微波复合陶瓷的制备和性能 |
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| 引用本文： | 王成,胡作启,伍双杰,王庆,赵旭.La2O3掺杂BST/Mg2TiO4微波复合陶瓷的制备和性能[J].材料研究学报,2011,25(1):109-112. |
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| 作者姓名： | 王成 胡作启 伍双杰 王庆 赵旭 |
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| 作者单位： | 华中科技大学电子科学与技术系 武汉 430074 |
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| 摘 要： | 用固相烧结法制备掺杂La2O3的Ba0.55Sr0.45TiO3/Mg2TiO4微波复合陶瓷,研究了掺杂对其微观结构、微波(f=10 GHz)介电性能和调谐率的影响.结果表明:当掺杂La2O3量(质量分数)为1.2%时,La3+进入BST晶格,且抑制了BST/Mg2TiO4中Ti从+4向+3价转化;La2O3的掺入比较...
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| 关 键 词： | 无机非金属材料 La2O3掺杂 固相烧结法 BST复合陶瓷 微波损耗 调谐率 |
| 收稿时间： | 2010-06-30 |
| 修稿时间： | 2010-08-02 |
Preparation and Properties of La_2O_3 Doped BST/Mg_2TiO_4 Microwave Composite Ceramics |
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| WANG Cheng HU Zuoqi WU Shuangjie WANG Qing ZHAO Xu.Preparation and Properties of La_2O_3 Doped BST/Mg_2TiO_4 Microwave Composite Ceramics[J].Chinese Journal of Materials Research,2011,25(1):109-112. |
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| Authors: | WANG Cheng HU Zuoqi WU Shuangjie WANG Qing ZHAO Xu |
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| Affiliation: | Department of Electronics Science and Technology,Huazhong University of Science and Technology, Wuhan 430074 |
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| Abstract: | La2O3 doped Ba0.55Sr0.45TiO3/Mg2TiO4 microwave composite ceramics were prepared by traditional solid-state reaction, and the influence of La2O3 doping on microstructure, dielectric properties and tuning was investigated. The results show that La3+ enters BST lattices when the mass fraction of La2O3 reach 1.2%, and La3+ doped sample can prevent the change of the chemical valence of Ti in BST/Mg2TiO4 composite system from +4 to +3. Mg2TiO4 and La2O3 doping can reduce the dielectric constant and microwave loss separately. The 1.2% La2O3 doped sample has the best properties: dielectric constant 52; tanδ 0.0011 (10 GHz), and the tunability 13.4% (3 kV/mm). |
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| Keywords: | inorganic non-metallic materials La2O3 doped solid-state reaction BST compositeinorganic non-metallic materials La2O3 doped solid-state reaction BST composite ceramics microwave loss tunabilityceramics microwave loss tunability |
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