The present invention relates to a method for preparing a metallic
membrane, more particularly to a method for preparing metallic membranes,
which comprises dissolving a transition metal of Period 3 and its alloy
particle powder and synthetic polymer in a fixed ratio; radiating or
casting to prepare a membrane precursor; oxidizing the synthetic polymer
on the membrane precursor under a mixed gaseous atmosphere of nitrogen
and hydrogen; and sintering the membrane precursor at a predetermined
temperature. The metallic membrane prepared by the process of the present
invention has excellent mechanical and chemical properties and enables to
maintain a relatively small pore size and high porocity than traditional
membranes. Therefore, it is useful for water treatment.