| 摘要 |
<p>PURPOSE:To increase heat capacity by forming a sintered body which is mainly composed of zinc oxide and containing the specific quantity of titanium and cobalt as subcomponent. CONSTITUTION:The title power resistor comprises an annular sintered body 1 composed of a main component of zinc oxide (ZnO) and a sub-component containing an annular sintered body consisting of titanium of 0.5 to 20mol% in terms of titanium oxide (TiO2) and cobalt of 0.5 to 30mol% in terms of cobalt oxide (CoO), electrodes 2 provided on both surfaces of the sintered body 1, and an insulating layer 3 covering the outer circumferential surface and the hollow part of the sintered body to prevent creeping discharge on the side face. The electrode 2 is formed by aluminum or nickel, and the insulating layer 3 is formed by resin or glass and ceramic. As a result, the heat capacity per unit volume can be increased, resistance temperature coefficient becomes positive and its absolute value becomes small, the variation in the resistance value due to surge absorption becomes small, and the power resistor, having large surge resistivity, can be obtained.</p> |
