无机高阻层对ZnO压敏电阻综合性能的影响  

Influence of Inorganic High Resistance Layer on the Comprehensive Properties of ZnO Varistor

作　　者：孔安廷 任鑫 劳学斌 钟美莲 江海波 姚政 施利毅[1] KONG Anting;REN Xin;LAO Xuebin;ZHONG Meilian;JIANG Haibo;YAO Zheng;SHI Liyi(College of Sciences,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学理学院,上海200444

出　　处：《电瓷避雷器》2023年第4期64-69,共6页Insulators and Surge Arresters

基　　金：上海市自然科学基金(编号:17ZR1410300);国家电网公司科技资助项目(±1 100 kV特高压直流输电线路雷电防护关键技术研究及应用编号:524625190020)

摘　　要：探究了涂覆不同Cr_(2)O_(3)/MgO比例无机高阻层对ZnO压敏电阻的微观结构以及电学性能的影响。通过研究发现,D2电阻片具有最佳的电气性能,其电位梯度E为222.5 V·mm^(-1),非线性数α为63.24,泄漏电流I_(L)为0μA,残压比K为1.69。最高可承受2 ms方波脉冲电流大小为300 A,老化系数Kct为0.85,且起始功率低,表现出良好的电学性能,更适合在电路中长期工作。The effect of coating inorganic high resistance layer with different Cr_(2)O_(3)/MgO ratio on the microstructure and electrical properties of ZnO varistor was investigated.It has been found that the D2 resistor has the best electrical performance,with the potential gradient E of 222.5 V·mm^(-1),the nonlinear coefficientαof 63.24,the leakage current I_(L) of 0μA,and the residual voltage ratio K of 1.69.It can withstand up to 2 ms rectangular waveform impulse current of 300 A,aging coefficient Kct of 0.85,and the initial power is low,showing good electrical performance,which is more suitable for long-term operation in the circuit.

关 键 词：无机高阻层 通流能力 电学性能 ZNO压敏电阻 

分 类 号：TM54[电气工程—电器]