| 摘要 |
Sheet-like membrane structures comprise metallic support means with a multiplicity of holes therethrough in mechanically inseparable intimate contact with at least one membrane of gas-permeable metal which closes each of said holes to passage of gas otherwise than by diffusion through the membrane. The structures may be formed by depositing (e.g. electrolytically) the gas-permeable metal on a non-perforate support and selectively removing e.g. by etching, portions of said support to form the holes. Specified materials are Pd or Pd/Ag alloy membranes on Ag of Ni supports. After formation, a Pd or Pd/Ag on Ni structure may be heat treated at 800 DEG C. to cause diffusion of Ni into the membrane and prevent, when used for diffusion of hydrogen absorption and consequent disruption near the edges of the holes. The alloying metals may be deposited as separate layers or simultaneously and subsequently subjected to alloying heat treatment, or deposited as alloys. If desired, an impressed pattern may be imparted to the support structure, and the membrane material coated thereon. By covering the opposite side with resist material and then removing the latter at the high parts of the pattern followed by etching, curved membrane structures positioned within the thickness of the support means, are formed. In another embodiment, the membrane is sandwiched between two support members, said membrane and at least one support member being electro-chemically deposited. Etching of both support members exposes the membrane. Support members may be roughened before deposition whereby the gas-permeable surfaces are increased in area.ALSO:Sheet-like membrane structures suitable for separating gases, comprise a metallic support means with a multiplicity of discrete holes therethrough and at least one member of gas permeable metal in mechanically inseparable intimate contact therewith which closes each of said holes to passage of gas otherwise than by diffusion through the membrane. The membrane sandwiched between parts of the support. The support may be in the form of a perforated plate and may be flat or of tubular or dished form and the individual portions of a membrane or individual membranes may be of curved form. Various materials are specified: thus Pd membranes may be supported on Ni supports, (which may result in the Ni modifying the Pd) or Ag supports. |
