Hydrogen separation filter

Abstract

The hydrogen separation filter includes a porous substrate and a super lattice layer on the porous substrate. The super lattice layer includes at least one lattice expansion layer containing a first material and at least two hydrogen dissociation and permeation layers containing a second material selected from the group consisting of Pd, V, Ta, Ti, Nb, and alloys thereof. The at least one lattice expansion layer and the at least two hydrogen dissociation and permeation layers are alternately stacked. The first material and the second material have a same crystalline structure. A lattice constant a1,bulk of a first bulk material haying a same composition and a same crystalline structure as the first material and a lattice constant a2,bulk of a second bulk material having a same composition and a same crystalline structure as the second material satisfy Formula (1): 1.03a2,bulk≤a1,bulk≤1.15a2,bulk  (1).

Dependencies are inferred from the claim text.