| Li-Zr共掺杂对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷介电性能的影响 |
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| 引用本文： | 张东,丁士华,宋天秀,杨秀玲.Li-Zr共掺杂对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷介电性能的影响[J].电子元件与材料,2008,27(7). |
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| 作者姓名： | 张东 丁士华 宋天秀 杨秀玲 |
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| 作者单位： | 西华大学,材料科学与工程学院,四川,成都,610039 |
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| 基金项目： | 四川省教育厅资助项目
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校人才基金 |
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| 摘 要： | 采用固相反应法制备了(Bi1.975Li0.025)(Zn2/3Nb4/3–xZrx)O7陶瓷,研究了当Li+替代量一定时,Zr4+掺杂对陶瓷相结构和介电性能的影响。结果表明,当替代量0
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| 关 键 词： | 无机非金属材料 Bi2(Zn1/3Nb2/3)2O7系陶瓷 单斜相焦绿石 替代 介电弛豫 |
Effects of Li-Zr codoping on the dielectric properties of Bi_2(Zn_(1/3)Nb_(2/3))_2O_7 ceramics |
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| ZHANG Dong,DING Shi-hua,SONG Tian-xiu,YANG Xiu-ling.Effects of Li-Zr codoping on the dielectric properties of Bi_2(Zn_(1/3)Nb_(2/3))_2O_7 ceramics[J].Electronic Components & Materials,2008,27(7). |
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| Authors: | ZHANG Dong DING Shi-hua SONG Tian-xiu YANG Xiu-ling |
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| Affiliation: | ZHANG Dong,DING Shi-hua,SONG Tian-xiu,YANG Xiu-ling ( College of Materials Science , Engineering,Xihua University,Chengdu 610039,China ) |
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| Abstract: | (Bi1.975Li0.025)(Zn2/3Nb4/3–xZrx)O7 ceramics were prepared by a solid phase reaction method. The effects of Zr4+ doped on phase structure and dielectric properties of (Bi1.975Li0.025)(Zn2/3Nb4/3–xZrx)O7 ceramics were investigated. The results reveal that (Bi1.975Li0.025)(Zn2/3Nb4/3–xZrx)O7 ceramics have single monoclinal pyrochlore phase by XRD. With the increase of Zr4+ substitution amount, the permittivity decrease and tanδ increase gradually. It is discovered that a shift of the relaxation peak for the tanδ is obviously observed at –30～+130℃. A defect dipole model is used to explain the phenomenon relaxation. When x increases from 0.05 to 0.10 and 0.15 then 0.20, the peak temperatures of (Li-Zr)-doped samples are 43, 68, 47 and 59 ℃, respectively. |
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| Keywords: | non-metallic inorganic material Bi2(Zn1/3Nb2/3)2O7 based ceramic monolinal pyrochlore substitution dielectric relaxation |
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