| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen separating permeable membrane with a defect- free hydrogen permeable metal film and metal supports which tightly support the metal film and in which numerous fine concave holes are arranged at high density and to provide a manufacturing method for reliably obtaining the membrane at a low cost. SOLUTION: The hydrogen separating permeable membrane 1 or 1a has a metal film 2 or an alloy film 2 comprising Pd as a hydrogen permeable metal element or a Pd-25 wt.% Ag alloy and a pair of metal supports 5, 6 fixed on both faces of the alloy film 2, or the like, the metal supports 5, 6 have numerous concave holes 8 ranging from their surfaces 5a, 6a to the surfaces 3, 4 of the alloy film 2, or the like, and the ratio (D/t) of the opening diameter D of the concave holes 8 in the surfaces of the metal supports 5, 6 to the total thickness (t) of the metal film 2, or the like, is within the range of 1.0-3.0.
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