【摘要】 对CA35型160 V/47μF液体钽电解电容器进行2 000 h/85℃高温负荷耐久性试验。通过对失效样品的电性能的测试及对样品阳极钽芯表面氧化膜的结构变化的SEM分析,探讨了其失效机理。表明在高温负荷条件下,由于场致晶化和热致晶化的作用,Ta2O5介质膜由无定形态转化为结晶态,介质膜结构发生畸变是引起产品失效的主要原因。更多还原

【Abstract】 The high-temperature loading test was made on the type of CA35 160 V/47 μF wet tantalum electrolytic capacitors for 2 000 h at 85 ℃.The failure mechanism was discussed by testing the electric performance of the failed samples and analyzing the anode dielectric film through SEM.The result shows that the transaction of Ta2O5 film from amorphous state into crystal state is arisen from the electric field and thermal effect and the structure aberration of the anode dielectric film is the main factor causing wet tantalum electrolytic capacitors to failure.更多还原