摘要
水煮处理前或后,将腐蚀铝箔作为阴极,在Zr(NO3)4溶液中进行直流电解沉积→500℃热氧化处理,然后在硼酸溶液中进行2级阳极氧化制得复合阳极氧化膜。用计算机监控系统采集了阳极氧化过程中的升压取线,用扫描电镜(SEM)和EDS能谱分析了氧化膜表面形貌和成分,用电化学交流阻抗(EIS)、LCR数字电桥测试了阳极氧化膜的电化学性能。结果表明:水煮处理前对腐蚀铝箔实施电解沉积-热氧化处理,可以使阳极氧化过程形成电量降低20%,氧化膜中Zr含量较高,氧化膜的比电容提高,但比电阻减小;水煮处理后对腐蚀铝箔实施电解沉积-热氧化处理,则阳极氧化时形成电量增加,阳极氧化膜中Zr含量较低,氧化膜比电容降低,但比电阻较高。
Etched-Al foils were, before or after hydration in boiling water, covered with ZrO2 film by DC-electrodeposition in Zr（ NO3 ）4 solution and following heat treatment at 500 ℃ , and then anodized in H3 BO4 solution to prepare Al2O3-ZrO2composite anodic oxide film. The time-variation in anode potential during anodization was recorded on a digital multimeter connected to a PC system. The surface morphology, composition and electrochemical properties of the film were examined by means of SEM, EDS and EIS/LCR digital bridge, respectively. The results show that comparing with only hydrated foil, the foil with ZrO2 prior to hydration can be anodized with higher efficiency by 20% and the formed film is rich in Zr, leading to a higher specific capacitance and a lower specific resistance. Whereas, the formation efficiency for the foil, deposited with ZrO2 posterior to hydration, is lower and the resulted film is poor in Zr, leading to a lower specific capacitance and a higher specific resistance.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第12期161-165,共5页
Transactions of Materials and Heat Treatment
基金
聊城大学博士科研启动资金(31805)
山东省自然科学基金(ZR2012EMM007)
关键词
铝电解电容器
电解沉积
铝箔
复合阳极氧化膜
aluminum electrolytic capacitor
electrolytic deposition
aluminum foil
composite anodic oxide film
