阶梯降压降幅对铝氧化膜阻挡层去除的影响

Influence of Different Voltage Decrement on Barrier Layer Elimination

研究了以不同降压幅值进行阶梯降压对铝阳极氧化膜孔阻挡层去除的影响,采用场发射扫描电镜对其进行表征。研究结果表明:阶梯降压法能有效地减薄阻挡层,其减薄程度视降压的幅度而定,采用小幅值降压的阶梯降压过程能有效地去除阻挡层。在降压瞬间,电流迅速减小,然后缓慢回复到一个新的稳定值。大幅值降压过程电流回复时间较长,小幅值降压过程电流回复时间较短。本文还探讨了小幅值阶梯降压过程去除阻挡层的原因。

The influence of different voltage decrement on barrier layer elimination is studied.The bottom morphology of the porous alumina,treated by current recovery with different voltage decrement,was characterized by field emission scanning electron microscopy(FESEM).The results show that the step-by-step voltage decrement eliminates the barrier layers effectively.Different voltage decrement can cause different reducing degree.The barrier layer eliminates efficiently when each voltage decrement is small.The current decreases sharply at the beginning of each voltage decrement,after that,it progressively rises to a steady value.The larger the voltage decrement is,the longer the current recovering time is.The reason of small voltage decrement penetrating the barrier layer effectively is also discussed in this paper.