| A位取代对(Ca0.61Nd0.26)TiO3陶瓷烧结特性和介电性能的影响 |
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| 引用本文： | 张启龙,孙慧萍,杨 辉,吴 飞.A位取代对(Ca0.61Nd0.26)TiO3陶瓷烧结特性和介电性能的影响[J].无机化学学报,2009,25(1):70-75. |
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| 作者姓名： | 张启龙 孙慧萍 杨 辉 吴 飞 |
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| 作者单位： | 浙江大学材料与化学工程学院,杭州,310027 |
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| 摘 要： | 采用常规固相反应法,以(Ca0.61Nd0.26)TiO3体系为基体成分,研究了A位取代对(Ca0.61Nd0.26)TiO3陶瓷的烧结特性和介电性能的影响规律。结果表明:Zn,Mg的A位取代,促使(Ca0.61Nd0.26)TiO3陶瓷烧结温度从1350℃降至1250℃。Zn,Mg在一定范围内A位取代(Ca0.61Nd0.26)TiO3中的Ca可形成钙钛矿结构的固溶体,Zn、Mg最大固溶度(x(Zn),y(Mg))分别不超过0.1和0.15mol。当取代量超过固溶度后,分别形成Ca2Zn4Ti15O36和MgTi2O5第二相。随Zn和Mg取代量的增加,陶瓷介电常数(εr)和谐振频率温度系数(τf)减小。陶瓷品质因数(Qf)值随Zn取代量先增后减,而随Mg取代量增加,其Qf值一直增大。Zn,Mg最佳取代分别为x(Zn)=0.15和y(Mg)=0.25,在1250℃烧结2h,(Ca0.85Zn0.15)0.61Nd0.26]TiO3的介电性能:εr=93.60,Qf=12454GHz,τf= 150.3ppm·℃-1,(Ca0.75Mg0.25)0.61Nd0.26]TiO3的介电性能:εr=72.48,Qf=14622GHz,τf= 108ppm·℃-1。
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| 关 键 词： | 无机非金属材料 钙钛矿结构 A位掺杂 介电性能 稀土 |
Effect of A-site Substitution on Sintering and Dielectric Properties of (Ca0.61Nd0.26)TiO3 Ceramics |
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| ZHANG Qi-Long,SUN Hui-Ping,YANG Hui and WU Fei.Effect of A-site Substitution on Sintering and Dielectric Properties of (Ca0.61Nd0.26)TiO3 Ceramics[J].Chinese Journal of Inorganic Chemistry,2009,25(1):70-75. |
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| Authors: | ZHANG Qi-Long SUN Hui-Ping YANG Hui and WU Fei |
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| Institution: | College of Materials Science and Chemical Engineering, Zhejiang Uuiversity, Hangzhou 310027,College of Materials Science and Chemical Engineering, Zhejiang Uuiversity, Hangzhou 310027,College of Materials Science and Chemical Engineering, Zhejiang Uuiversity, Hangzhou 310027 and College of Materials Science and Chemical Engineering, Zhejiang Uuiversity, Hangzhou 310027 |
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| Abstract: | |
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| Keywords: | inorganic non-metal materials perovskite structure A-site substitution dielectric properties rare earths |
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