摘要 |
<p>PURPOSE:To realize a ceramic composition for voltage nonlinear resistor in which deterioration of characteristics can be avoided under high temperature atmosphere by enhancing moisture resistance while achieving excellent varistor characteristics such as surge resistance or nonlinear coefficient. CONSTITUTION:An elemental body is composed of 98.0-99.9mol.% of (Sr1-X-YBaXCaY)TiO3 as main component (where, X<=0.3, Y<=0.25) and 0.1-2.0mol.% of Nb, W, Ta, In, Y or at least one kind of oxide selected from rare earth elements as a semiconducting agent. The elemental body is then added with 0.01-2.0wt.% of metallic oxidizing agent, i.e., a mixture of at least one kind of oxide selected from Cub, PbO, Bi2O3, Sb2O3, V2O5, MoO3, and NaXTiYOZ, (where, X=2n, Y=2n', Z=n+3n', n and n' are natural number).</p> |