Gas separation membrane made of dense ceramic

摘要

The present invention is related to a method for obtaining a gas-separating dense ceramic membrane, comprising the following steps : an organic dispersant is mixed with an organic solvent to for a mixture, a ceramic ion-conducting and/or mixed-conducting powder whose particle size distribution is such that the particle size is lower than 10 mu m and, for at least 25% by volume, is less than 1 mu m, is added to said mixture to form a suspension, an organic binder is added to said suspension, the suspension is converted into a desired form, the organic solvent is removed from said suspension, thermally and/or by extraction with a non-solvent, and the product obtained and having the desires form undergoes a thermal treatment to obtain a dense structure. The present invention is also related to the membrane obtained by said method, and to its use for the filtration and/or the separation of gas mixtures.