| 非化学计量比Li_(2+x)ZnTi_3O_(8+0.5x)微波介质陶瓷的性质研究 |
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| 引用本文： | 覃远东,宾月景,梁自伟,褚冬进,方亮.非化学计量比Li_(2+x)ZnTi_3O_(8+0.5x)微波介质陶瓷的性质研究[J].电子元件与材料,2012(10):5-8. |
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| 作者姓名： | 覃远东 宾月景 梁自伟 褚冬进 方亮 |
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| 作者单位： | 广西新未来信息产业股份有限公司;北海市工业和信息化委员会;桂林理工大学广西有色金属及特色材料省部共建国家重点实验室培育基地 |
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| 基金项目： | 广西科学研究与技术开发计划资助项目(No.桂科攻11107006-42) |
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| 摘 要： | 采用传统固相反应法制备Li2+xZnTi3O8+0.5x微波介质陶瓷,研究了A位Li的非化学计量比对Li2+xZnTi3O8+0.5x陶瓷的烧结特性、相结构及微波介电性能的影响。结果表明:随着Li2+xZnTi3O8+0.5x(x=–0.2～+0.2)陶瓷中Li含量的逐渐增加,TiO2相逐渐消失,陶瓷的致密度逐渐升高,介电常数逐渐降低,Q.f值先上升再下降,谐振频率温度系数逐渐降低,然后保持不变。当x=–0.05时,Li1.95ZnTi3O7.975陶瓷取得最佳的综合微波介电性能:εr=26.41,Q.f=65 200 GHz,τf=–4.16×10–6/℃。
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| 关 键 词： | 微波陶瓷 非化学计量 介电性能 尖晶石 |
Study on properties of nonstoichiometric Li2+xZnTi3O8+0.5x microwave dielectric ceramics |
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| QIN Yuandong,BIN Yuejing,LIANG Ziwei,CHU Dongjin,FANG Liang.Study on properties of nonstoichiometric Li2+xZnTi3O8+0.5x microwave dielectric ceramics[J].Electronic Components & Materials,2012(10):5-8. |
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| Authors: | QIN Yuandong BIN Yuejing LIANG Ziwei CHU Dongjin FANG Liang |
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| Affiliation: | 1.Guangxi New Future Information Industry Co.,Ltd,Beihai 536000,Guangxi Zhuangzu Zizhiqu,China;2.Beihai Municipal Industry and Information Commission,Beihai 536000,Guangxi Zhuangzu Zizhiqu,China;3.State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing,Guilin University of Technology,Guilin 541004,Guangxi Zhuangzu Zizhiqu,China) |
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| Abstract: | The Li2+xZnTi3O8+0.5x microwave dielectric ceramics were prepared by the conventional solid-state reaction method.The effects of nonstoichiometric Li element on A site on sintering behavior,phase structure and microwave dielectric properties of Li2+xZnTi3O8+0.5x ceramics were investigated.The results show that TiO2 phase disappears gradually,the bulk densities of the ceramics increase gradually,the permittivities decrease gradually,Q.f values first increase and then decrease,and the temperature coefficients of resonant frequency decrease slightly then keep a constant with increasing of Li content of Li2+xZnTi3O8+0.5x(x= –0.2～+0.2) ceramics.When x equals to –0.05,Li1.95ZnTi3O7.975 ceramic possesses the best microwave dielectric properties: a εr of 26.41,Q.f value of 65 200 GHz,τf of –4.16×10–6/℃. |
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| Keywords: | microwave ceramic nonstoichiometry dielectric properties spinel |
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