| 热处理对ZnO变阻器电学性能影响的研究 |
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| 引用本文： | 姚政,郑嘹赢,李国荣,蔡闻捷,李玉科.热处理对ZnO变阻器电学性能影响的研究[J].电瓷避雷器,2009(5). |
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| 作者姓名： | 姚政 郑嘹赢 李国荣 蔡闻捷 李玉科 |
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| 作者单位： | 1. 上海电瓷厂,上海,200241
2. 中国科学院上海硅酸盐研究所,信息功能材料与器件研究中心,上海,200050 |
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| 基金项目： | 国家自然科学基金资助项目，上海市产业技术创新重大项目，863项目 |
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| 摘 要： | 采用高能球磨的方法制备了ZnO和添加物(MnO,Sb2O3,CoO,Cr2O3,Bi2O3)的前驱超细粉体,采用固相反应烧结技术在1 140℃进行2 h烧结制备出ZnO陶瓷变阻器。用SEM,XRD研究了不同退火温度对ZnO压敏陶瓷的显微形貌、相结构,伏安非线性特性和微观电性能的影响。从阻抗分析,激活能和介电损耗与频谱关系分析证明了600～800℃热处理时晶界由于β-Bi2O3向γ-Bi2O3的相变引起的体积膨胀而变宽,导致晶界电子陷阱浓度降低,从而使得势垒高度下降,漏电流增加。
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| 关 键 词： | 氧化锌 变阻器 热处理 |
Study on the Effect of Heat Treatment on the Electric Property of ZnO Varistors |
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| YAO Zheng,ZHENG Liao-Ying,LI Guo-Rong,CAI Wen-Jie,LI Yu-ke.Study on the Effect of Heat Treatment on the Electric Property of ZnO Varistors[J].Insulators and Surge Arresters,2009(5). |
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| Authors: | YAO Zheng ZHENG Liao-Ying LI Guo-Rong CAI Wen-Jie LI Yu-ke |
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| Affiliation: | YAO Zheng1,ZHENG Liao-Ying2,LI Guo-Rong2,CAI Wen-Jie2,LI Yu-ke2(1.Shanghai Porcelain Works,Shanghai 200241,China,2.Shanghai Institute Of Ceramics,Chinese Academy of Sciences,Information Materials , Devices Research Center,Shanghai 200050,China) |
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| Abstract: | The superfine powders of ZnO and composite oxides(MnO,Sb2O3,CoO,Cr2O3,Bi2O3) were ground with high energy ball milling.Then the ZnO ceramic varistors were prapared by sintering at 1 140 ℃ for 2h using solid state reaction technology.The effect of different annealing temperature on microstructure,phase texture,nonlinear property and micro electric properties were studied using SEM and XRD.Impedance test,activation energy test and dissipation factor-frequency spectrum dependence analisis proved that at heat treatment of 600～800 ℃ grain boundary widened caused by volume expan-sion due to β-Bi2O3 phase transition to γ-Bi2O3,leading to the reducing of grain boundary electron trap concentration,making the barrier height drop,and leakage current increase. |
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| Keywords: | ZnO varistors heat treatment |
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