抑制浪涌电流用NTCR热敏电阻器的失效模型

摘要

The failure mechanism of NTC thermestors for suppressing surge current lies in uneven microstructure and poor contact between silver layer and ceramic body. The surface failure mode, interior defect mode, appearance failure mode are established. The failure factors are determined and the improvement is made.(2 refs.)%通过对抑制浪涌电流用NTCR热敏电阻器的失效样品进行电性能和显微分析得知，其失效机理在于微观结构不均匀及银层与瓷体的接触不良。建立了表面失效、内部缺陷、外观失效三种模型。确定了影响失效的因素及对策。