一、前言 PTC半导体淘瓷具有热敏特性和独特的恒温发热特性,在机电工业和家用电器等领域均有广泛的应用。不论把它用作热敏电阻器还是发热元件均需在表面敷设金属电极,因此必然存在半导体材料与金属的接触 First, the foreword PTC semiconductor Amorphous porcelain with thermal characteristics and unique characteristics of constant temperature heat, in the electrical and mechanical industries and household appliances and other fields have a wide range of applications. Regardless of whether it is used as a thermistor or a heating element, a metal electrode needs to be laid on the surface, so there must be a contact between the semiconductor material and the metal