PRODUKTIONSFREMGANGSMÅDE TIL ET PROTON-LEDENDE-LAGSYSTEM

摘要

The invention relates to a layer system for isolating hydrogen from gases containing hydrogen and to an associated production method. The layer system consists of two proton conducting, gas-tight layers. A functional layer consisting of a material with a high proton conductivity, which is however sensitive to process gases such as CO₂ or aggressive trace gases, constitutes the largest proportion of the thickness of the layer system. Said layer is protected by a thin protective layer consisting of a material whose proton conductivity is lower but which is insensitive to reactive gases. Said layer system permits an improved proton conductivity to be obtained with a predefined gas tightness and total thickness of the layer in relation to prior art. In the production method, an alkaline-earth metal carbonate is reduced to form an oxide, which has solid-state reactions with previously applied layers of zirconium or rare earth metals. The protective layer and functional layer are produced by sintering.