金属氧化物避雷器的基本结构是阀片[5 2]，阀片用氧化锌（ZnO）为主要材料，掺以少量其他金属氧化物添加剂经高温焙烧而成，具有良好的非线性压敏电阻特性，因此又叫压敏避雷器。
The basic structure of metal oxide arrester is valve disc [52]. The valve disc is made of zinc oxide (ZnO) as the main material, mixed with a small amount of other metal oxide additives and calcined at high temperature. It has good non-linear varistor characteristics, so it is also called varistor arrester.
这种烧结体的基本结构是高电导的氧化锌晶粒，电阻率为1Ωcm。边缘由高电阻性的（主要是金属氧化物附加物）粒界层包围，电阻率在低电场强度下约为1010 ~ 1014Ωcm。
The basic structure of the sintered body is high conductivity zinc oxide grains with a resistivity of 1_cm. The edge is surrounded by a high resistivity (mainly metal oxide additives) grain boundary layer. The resistivity is about 1010 - 1014_cm at low electric field strength.