Surge Arrester Resistor

Metal Oxide Resistors

The metal oxide resistor is the core part of the lightning arrester. It uses zinc oxide as the main component, adding a small amount of bismuth oxide, cobalt oxide, chromium oxide, manganese carbonate, antimony oxide and other trace additives, and is sintered at high temperature. The microstructure of metal oxide resistors is mainly composed of zinc oxide grains, grain boundary layer and spinel phase. Its conduction mechanism is generally believed that zinc oxide grains have good electrical conductivity, and the voltage applied to zinc oxide grains is almost all applied to the high-resistance grain boundary layer, and the nonlinearity of the resistor sheet mainly comes from the grain boundary layer ( Bismuth oxide is the main component), and the spinel phase is scattered in the grain boundary layer. It is a composite oxide composed of zinc oxide and bismuth oxide. Its function is to inhibit the growth of zinc oxide grains, so that the resistor has a more Excellent nonlinear characteristics.