不同稀土氧化物掺杂对ZnO压敏电阻性能的影响  

Effect of Rare Earth Oxides on Performance of ZnO Varistors

作　　者：祝志祥 张强 曹伟 刘静 谷山强[2] 万帅[2] 孙雨旸 武艳琪 潘俊乔 ZHU Zhixiang;ZHANG Qiang;CAO Wei;LIU Jing;GU Shanqiang;WAN Shuai;SUN Yuyang;WU Yanqi;PAN Junqiao(State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China;Hubei Key Laboratory of Power Grid Lightning Risk Prevention,Wuhan NARI Limited Company Grid Electric Power Research Institute,Wuhan 430074,Hubei,China;State Grid Anhui Electric Power Co.,Ltd.Hefei 230022,Anhui,China;Tongxiang Tsingfeng Technology Co.,Ltd.Jiaxing 314501,Zhejiang,China;Foshan(Southern China)Institute For New Materials,Foshan 528200,Guangdong,China)

机构地区：[1]全球能源互联网研究院有限公司先进输电技术国家重点实验室,北京102211 [2]国网电力科学研究院武汉南瑞有限责任公司电网雷击风险预防湖北省重点实验室,湖北武汉430074 [3]国网安徽省电力有限公司,安徽合肥230022 [4]桐乡清锋科技有限公司,浙江嘉兴314501 [5]佛山(华南)新材料研究院,广东佛山528200

出　　处：《陶瓷学报》2021年第4期595-600,共6页Journal of Ceramics

基　　金：国家电网有限公司总部科技项目(5200-201940081A-0-0-00)。

摘　　要：采用传统烧结工艺以纳米ZnO粉末为原料制备ZnO压敏电阻。通过在配方中引入La_(2)O_(3)、CeO_(2)、Sm_(2)O_(3)、Y_(2)O_(3)等稀土氧化物对其进行掺杂改性,研究不同稀土氧化物掺杂对ZnO压敏电阻性能的影响。利用XRD、SEM、压敏电阻直流参数仪对样品进行表征分析。研究结果表明,稀土氧化物掺杂能够抑制ZnO晶粒的生长,提升ZnO压敏电阻的电压梯度与非线性系数,有效降低样品的漏电电流。当使用0.7 mol%的Y_(2)O_(3)进行掺杂改性时,所制样品的综合电性能最佳,其电压梯度为613 V/mm,漏电流IL为0.26μA,非线性系数α为60.4。ZnO varistors modified with various rare earth oxides,including La_(2)O_(3),CeO_(2),Sm_(2)O_(3) and Y_(2)O_(3),were prepared with nanosized ZnO powder by using the conventional ceramic process.The effect of rare earth oxide dopants on the performance of ZnO varistors was systematically studied.The samples were characterized by using XRD,SEM,and DC parameter.It was found that rare earth oxides inhibited the grain growth of ZnO,improved voltage gradient and nonlinear coefficient and reduced the leakage current of the samples.The sample with 0.7 mol%of Y_(2)O_(3) displayed the optimized performance,with a voltage gradient of 613 V/mm,a leakage current(IL)of 0.26μA and a nonlinear coefficient(α)of 60.4.

关 键 词：氧化锌压敏电阻 稀土氧化物 微观结构 电学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]