| CaCu_3Ti_4O_(12)-ZnNb_2O_6复合材料的介电逾渗及固相反应 |
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| 引用本文： | 梁晓军,巩会玲,李旺,黄伟军,刘宇.CaCu_3Ti_4O_(12)-ZnNb_2O_6复合材料的介电逾渗及固相反应[J].电子元件与材料,2009,28(5). |
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| 作者姓名： | 梁晓军 巩会玲 李旺 黄伟军 刘宇 |
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| 作者单位： | 1. 南昌大学,理学院,基础物理实验中心,江西,南昌,330031
2. 南昌大学,材料科学与工程学院,江西,南昌,330031 |
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| 基金项目： | 教育部长江学者和创新团队发展计划，南昌大学创新团队建设计划 |
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| 摘 要： | 以低εr的ZnNb2O6为基体,以高εr的CaCu3Ti4O12(CCTO)为增强体,研究了CCTO-ZnNb2O6复合材料体系的介电逾渗行为以及高温下的固相反应。结果表明:当CCTO体积分数超过51.0%时,εr突然跃迁,达到5600,表现为介电逾渗。CCTO与ZnNb2O6在900℃以上会发生固相反应,生成Cu0.5Ti0.5NbO4、CaNb2O6、Zn2TiO4及一种与CCTO衍射峰相似、晶格常数比CCTO略大的未知物质,分析认为该未知物质是Nb5+取代CCTO中部分Ti4+而形成的固溶体。
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| 关 键 词： | 复合材料 CaCu3Ti4O12 固相反应 介电逾渗 跃迁 |
Dielectric percolation and solid-state reaction of the CaCu_3Ti_4O_(12)-ZnNb_2O_6 composite materials |
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| LIANG Xiaojun,GONG Huiling,LI Wang,HUANG Weijun,LIU Yu.Dielectric percolation and solid-state reaction of the CaCu_3Ti_4O_(12)-ZnNb_2O_6 composite materials[J].Electronic Components & Materials,2009,28(5). |
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| Authors: | LIANG Xiaojun GONG Huiling LI Wang HUANG Weijun LIU Yu |
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| Affiliation: | 1. Center for Basic Physics Experiment;School of Sciences;Nanchang University;Nanchang 330031;China;2. School of Materials Science and Engineering;China |
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| Abstract: | By chosing ZnNb2O6 with lower permittivity as matrix and CaCu3Ti4O12 with higher permittivity as reinforcement, the dielectric percolation behaviour and solid-state reaction under high sintering temperature of the CaCu3Ti4O12-ZnNb2O6 composites were studied. The results show that dielectric percolation behaviour can be observed and the relative permittivity suddenly transits to 5 600 when the volume fraction of CaCu3Ti4O12 is over 51.0%. The solid-state reactions between CaCu3Ti4O12 and ZnNb2O6 occur at 900... |
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| Keywords: | CaCu3Ti4O12 |
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