GRAIN BOUNDARY OXIDATION TYPE NON-LINEAR RESISTANCE ELEMENT

摘要

PURPOSE:To obtain the title resistance element provided with both varistor characteristics and capacitor characteristics, and also having high varistor voltage, a large non-linear coefficient and large withstanding surge voltage by a method wherein a specifically prescribed quantity of a specific oxide is contained in the element consisting of (Sr1-xCax)TiO3, and Nb, W, Ta and In or an oxide of rare-earth element. CONSTITUTION:Against an element consisting of (Sr1-xCax)TiO3 (provided that x=0.25) of 98.0 to 99.9mol% and an oxide, consisting of at least a kind selected from Nb, W, Ta, In and a rare-earth element, of 0.1 to 2.0mol%, sodium oxide, titanium oxide, molybdenum oxide of 0.01 to 2.0mol% in total quantity of (Na2O0, TiO20 and MoO3=0, by converting the above-mentioned material into Na2O, TiO2 and MoO3, is added. For example, the base material of the semiconductor porcelain, which is sintered and mainly composed of the above- mentioned composition, is coated with the mixed oxide of Na2O, TiO2 and MoO3, together with varnish, a heat treatment is conducted thereon at 1200 deg.C for two hours in the air, and a porcelain unit to be used for element can be obtained.