The present invention relates to a method for producing a ceramic layer of high porosity, and these layers of porous ceramic particles, preferably aluminum, in a metal, ceramic, the enamel and / or a glass substrate using the titanium oxide and zirconium oxide and the inorganic binder system oxide It relates to the method used. The inorganic binder system is to 100nm or less, preferably not more than 50nm, and particularly preferably comprises at least one ceramic nano particles having a particle size of less than 25nm, the solvent is water. The layer produced in this manner are, for example, suitable as the canonical catalytic active layer, etc. Here the oven, the combustion engine, or in general, coating a substrate, for example, suitable for significantly increasing the specific surface with respect to the catalyst substrate.