Fabrication and Characterization of Single Phase α-Alumina Membranes with Tunable Pore Diameters.

ABSTRACT: Nanoporous and single phase α-alumina membranes with pore diameters tunable over a wide range of approximately 60-350 nm were successfully fabricated by optimizing the conditions for anodizing, subsequent detachment, and heat treatment. The pore diameter increased and the cell diameter shrunk upon crystallization to α-alumina by approximately 20% and 3%, respectively, in accordance with the 23% volume shrinkage resulting from the change in density associated with the transformation from the amorphous state to α-alumina. Nevertheless, flat α-alumina membranes, each with a diameter of 25 mm and a thickness of 50 μm, were obtained without thermal deformation. The α-alumina membranes exhibited high chemical resistance in various concentrated acidic and alkaline solutions as well as when expose

SUBMITTER: Masuda T 

PROVIDER: S-EPMC5455454 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature