不同SiO2含量对氧化锌电阻片通流性能的影响  

Influence of Different SiO2 Addition on the Current Performance of ZnO Varistor

作　　者：王博闻 方针 付志瑶 胡建平 彭永晶 WANG Bowen;FANG Zhen;FU Zhiyao;HU Jianping;PENG Yongjing(State Key Laboratory of Disaster Prevention&Reduction for Power Grid Transmission and Distribution Equipment,State Grid Hunan Electric Power Company Disaster Prevention and Reduction Center,Changsha 410129,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]电网输变电设备防灾减灾国家重点实验室,国网湖南省电力公司防灾减灾中心,长沙410129 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《材料导报》2020年第S02期52-56,共5页Materials Reports

基　　金：国家电网科技项目(5216A01700UD)。

摘　　要：氧化锌阀片由于具有优异的能量耐受性能,在电力系统防雷上得到了广泛的应用。本工作研究了SiO2含量对ZnO压敏电阻的相变、微观结构和电性能的影响。结果表明,SiO2影响ZnO晶粒生长,当SiO2含量从0.2%(摩尔分数,下同)增加到2.0%时,ZnO的晶粒尺寸从8.87μm下降到5.86μm,从而导致击穿电压E1mA从192.77V/mm增加到252.57V/mm。另外,SiO2对氧化锌电阻片的电流能量耐受能力和脉冲老化特性具有显著影响,SiO2含量为1.5%时其通流性能最优,具有332.03J/cm^3的能量耐受能力和1.71的残压比(5kA)。Zinc oxide varistors have been widely used in lightning protection of power systems due to their energy tolerance.This work studied the effect of SiO 2 addition on the current performance of ZnO varistors.The effects of SiO 2 content on the phase transition,microstructure and electrical properties of ZnO varistors were studied.Among these components,SiO 2 affects ZnO grain growth.When the SiO 2 content increases from 0.2mol%to 2.0mol%,the grain size of ZnO decreases from 8.87μm to 5.86μm,resulting in a breakdown voltage E 1mA range from 192.77 V/mm to 252.57 V/mm.On the other hand,SiO 2 has a significant effect on current energy withstanding capability and pulse aging characteristics.The results show that the content of SiO 2 is 1.5mol%,and its current performance is the best.It has an energy capacity of 332.03 J/cm^3 and a residual voltage ratio of 1.71 at a current of 5 kA.

关 键 词：氧化锌电阻片 二氧化硅 能量耐受能力 脉冲老化特性 残压比 

分 类 号：O614.241[理学—无机化学]