Elaboration of La1−xSrxFe1−yGayO3−δ multilayer membranes by tape casting and co-firing for syngas application

The decrease of the dense layer thickness can lead to increase the internal stresses in the membrane due to the chemical expansion of membrane material under a large gradient of oxygen partial pressure. This chemical expansion due to p O 2 gradient through the membrane leads to important mechanical stresses in the membrane and commonly to the membrane rupture under large range of p O 2 , i.e. air/methane atmosphere. The solution suggested in this paper is the elaboration by tape casting and co-firing process of multilayer membranes with a specific design in order to decrease stresses due to the chemical expansion in working conditions.