阳极TiO2薄膜两步施加电压法制备参数对其形貌的影响

Ti的硫酸阳极氧化中硫酸的腐蚀性不足以溶解TiO2阻挡层,采用高温、高电压又会使膜纳米孔的孔径大于200 nm,使其应用范围受到限制.采用两步施加电压的方法,对钛阳极进行阳极氧化处理,以期在不同的工艺条件下制备具有不同孔径和孔密度的氧化钛薄膜.使用扫描电子显微镜考察了初始电压、终态电压、电解液温度、氧化时间等工艺参数对阳极氧化钛薄膜形貌的影响.结果表明,初始电压对氧化钛薄膜形貌的影响是通过改变电解液/阻挡层之间的界面条件来实现的;随着阳极氧化时间的延长纳米孔的孔径减小,孔密度增大;提高电解液的温度不影响纳米孔的形成过程,但对氧化钛薄膜的生长过程产生了比较大的影响.

Effect of Anodizing Parameters for Two-Step Applied Voltage Route on the Morphology of Anodic TiO_2 Film

Titanium anode was anodized by using a two-step applied voltage mediod. The effects of initial potential, final po-tential , and temperature of electrolyte as well as anodizing time on the morphology of the anodized titania films were investigated by means of scanning electron microscopy. Results indicate that the effect of initial potential on the morphology of the anodized titania films was realized by changing the interface state between the elec-trolvte and barrier. The size of the nanopores of the anod...