摘要
在合适的条件下利用阳极氧化高纯铝片 ,可以获得多孔结构的氧化铝 ,其孔径大小和排列方式都很均匀 .由于孔的深度不受限制 ,因此可以制备出孔深很大的多孔氧化铝 .这种多孔结构可以用作制备纳米材料的模板 .利用0 3mol L的草酸溶液在 4 0V的直流电压下 ,采用二步氧化法获得了高质量的氧化铝多孔模板 ,其典型孔径值为4 0— 70nm ,孔间距约 1 1 0nm ,深度可达毫米量级 .分析了溶液温度对结果的影响 ,比较了单步法和两步法获得的样品的多孔结构 。
Porous alumina films can be achieved by anodizing an ultra pure aluminum sheet in proper conditions. Both the distribution and the size of the pores are regular. The depths of the pores are uniquely limited by the anodization time thus very deep pores can be obtained, in the order of mm. Such a porous structure can be employed to serve as the templates for nano sized materials. The Oxalic acid of 0 3mol/L was used in our experiments with the applied DC voltage 40 V. The two step method was involved to fabricate the templates. The resultant templates exhibit regular porous section. The pore size is ～40—70 nm and the pore pore spacing is～110 nm. The depth is～0 4 mm. The dependence of the template quality on the solution (oxalic acid) temperature was analyzed and the comparison between the single step and two step anodization was made. The results indicate that low solution temperature and two step method are necessary.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期1952-1955,共4页
Acta Physica Sinica
基金
苏州科技学院青年教师基金资助的课题~~
