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阳极氧化法制得的Al_2O_3超微筛膜,作为透射电镜试样载膜,除具有一般微筛膜的特点外,它的机械强度好,并且Al_2O_3的晶格条纹像可作为电镜倍率的内标,因其微筛孔尺寸较小,可载持微细的电镜试样。本文主要考察Al_2O_3超微筛制备时的各种困素如:铝箔表面形貌、阳极氧化电压,电流密度、氧化电解液的种类、浓度、温度及微筛膜的热处理等的影响。另外对所得Al_2O_3超微筛膜作了其筛孔大小分布的测定,最后提出了认为可取的制备条件(结果见图a、b)8％草酸水溶液作为氧化电解液阳极氧化电压为10V电流密度为2～5mA/(cm)_2时间取30s
Anodized Al_2O_3 ultrafiltration membrane, as a transmission electron microscope sample carrier membrane, in addition to having the general characteristics of micro-sieve membrane, its mechanical strength, and Al 2 O 3 lattice fringe image can be used as electron microscope magnification of the internal standard, Due to its small size of the micro-sieve can support the fine electron microscopy sample. In this paper, we mainly investigate the effects of various factors such as surface morphology, anodization voltage, current density, the type of electrolyte, concentration, temperature and the heat treatment of micro-sieve membrane on the preparation of Al 2 O 3 superfine sieve. In addition, the obtained sieve size distribution of Al 2 O 3 ultrafiltration sieve was measured. Finally, it was proposed that the preparation conditions (see Fig. A and b) of 8% oxalic acid aqueous solution as oxidation electrolyte were proposed. The anodization voltage was 10V and the current density was 2 ~ 5mA / (cm) _2 time take 30s