制备工艺对多孔阳极氧化铝特性的影响  

Effects of Fabrication Methods on Property of Porous Anodic Alumina

作　　者：张霞[1] 胡明[1] 孟宪权[1] 

机构地区：[1]武汉大学物理科学与技术学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2009年第5期544-548,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10775106;60676036)

摘　　要：通过对草酸溶液中制备的多孔阳极氧化铝（PAA）的形貌、晶态结构和光致发光（PL）特性的表征和机理分析,研究了草酸电解液浓度、阳极氧化电压和退火等工艺对PAA的形成及特性的影响.PAA的孔径在50～120 nm之间,且随着阳极氧化电压的升高而增大,而受电解液浓度的影响较小.X射线衍射结果表明：PAA为非晶态结构,退火之后结晶,并有多相共存.PL测试表明PAA在375～500 nm之间有一较宽的蓝色发光带,发光峰在425 nm左右,是由氧空位引起的,且其峰强可通过改变阳极氧化电压和草酸浓度等参数来调制.The effect of electrolyzing solution concentration, oxidation voltage and annealing treatment were studied by analyzing porous anodic alumina（PAA）＇s morphology, structure and photoluminescenee properties in oxalic acid. The results show that the pore diameter increases with the increase of oxidation voltage, but changes less remarkably with solution concentration than with the former. X-ray diffraction analysis shows that PAA will turn to crystal with some phases coexisted after annealing treatment; and there is a strong photoluminescence（PL） band in the range of 375-500 nm with a peak position at around 425 nm owing to oxygen vacancy, which can be modulated by change parameters such as solution concentration, voltage, and so on.

关 键 词：多孔阳极氧化铝 两步阳极氧化 光致发光 

分 类 号：TQ133.1[化学工程—无机化工] TB383[一般工业技术—材料科学与工程]