Non-linear electrical resistor having varistor characteristics

摘要

A ceramic composition for use in production of non-linear resistors. This composition comprises strontium titanate (or a mixture containing strontium titanate as a major ingredient) and 0.1 to 1.0 mol % of Er2O3, Ho2O3 or mixtures thereof. In a preferred composition 0.02 to 0.2 mol % of at least one of MnO2, Co2O3 or mixtures thereof are included. Non-linear resistors produced using the composition are comparable to those produced from conventional ceramic compositions in the threshold level voltage and non-linear factor but have greatly improved flexural strength.