摘要
以HCl-H_2SO_4溶液为发孔液,1 mol·L^(–1)的HNO_3为扩孔液,聚乙二醇作为缓蚀剂以730 V二级化成箔的比容为主要评价指标,并结合扫描电镜分析结果,研究了缓蚀剂浓度、扩孔时间和温度对超高压铝箔扩孔效果的影响。结果表明:扩孔液中添加聚乙二醇作缓蚀剂,可有效提高腐蚀扩孔效果;缓蚀剂浓度增大时,腐蚀箔的孔密度增大,孔径变小;扩孔温度和扩孔时间也显著影响腐蚀扩孔效果。在730 V下化成时,扩孔液中聚乙二醇的最佳浓度为1.0 g·L^(–1);在含1.0 g·L–1聚乙二醇的1 mol·L^(–1)HNO_3腐蚀液中恒流扩孔时,最佳时间为500 s,最佳温度为75℃,化成箔比容达到0.434×10^(–6) F·cm^(–2),与不含缓蚀剂时扩孔、化成所得铝箔相比,比容提高8.5%。
The initial etching process was in HCl-H_2SO_4 solution. In the extending hole solution of 1 mol·L-1HNO_3, polyethylene glycol was added as inhibitor. Effects of the concentration of inhibitor, corrosion time and temperature on the hole extending results of supervoltage aluminum foil were investigated by means of SEM data and with the specific capacitance of 730 V secondary formed foils as the main evaluation index. The results show that the introduction of the inhibitor polyethylene glycol lead to an increasing of the specific capacitance of anodic aluminum foil. Pit density is increased and pit diameter is decreased with the increase of the concentration of inhibitor. Besides, corrosion time and temperature also affect the corrosion effect significantly. The favorable concentration of polyethylene glycol is 1.0 g·L-1 when aluminum foil is formed at 730 V. When the concentration of inhibitor reaches to 1.0 g·L-1 and the corrosion time is 500 s at 75 ℃, the specific capacitance of anodic aluminum foil reaches the maximum value of 0.434×10–6 F·cm–2, increased by 8.5% compared with that aluminum foil without inhibitor.
出处
《电子元件与材料》
CAS
CSCD
2016年第5期81-84,共4页
Electronic Components And Materials
基金
广西科学研究与技术开发计划项目资助(No.桂科攻1598007-25)
关键词
超高压
铝电解电容器
阳极箔
缓蚀剂
聚乙二醇
比容
supervoltage
aluminum electrolytic capacitor
anode foil
inhibitor
polyethylene glycol
specific capacitance
