Hochkomprimierter nichtlinearer spannungsabhängiger Widerstand und Herstellungsverfahren.

摘要

When manufacturing a voltage non-linear resistor, the sintering process is divided into two completely separated steps, i.e. primary and secondary sinterings. The primary sintering is carried out under a reduced pressure and the secondary sintering is conducted under atmospheric pressure with a sufficient amount of oxygen. The primary sintering is effected such that the relative density and open porosity of the primarily sintered body are limited to 85% or more and 1% or less, respectively. Then in the second sintering the voids in the body are removed to a large extent and also the oxidation is sufficiently effected. Therefore, the finally sintered body has the high density, large surge withstanding capability, and high non-linearity index.