| 摘要 |
A composite membrane for separating components of fluid mixtures including either a porous, essentially continuous, vacuum-deposited ceramic layer, supported by a porous substrate, the ceramic layer comprising at least one oxide selected from aluminum, titanium, tantalum, niobium, zirconium, silicon, thorium, cadmium and tungsten oxides, wherein the average width of the substrate pores is greater than that of the ceramic layer pores, subject to stated conditions; or a multi-layer system of at least two such ceramic layers, disposed on at least one side of, and supported by, a porous substrate, the ceramic layers comprising at least one of the above-specified oxides, wherein between successive ceramic layers, there is disposed a vacuum-deposited metallic layer wherein the porosity and (or) average pore width of the metallic layer is less than those of the ceramic layer. The invention further relates to the application of similar membranes to TLC and column chromatography. |
