Ceramic flat membrane and method for producing the same

A process for producing ceramic flat membranes, comprising:

• producing ceramic suspensions from at least two ceramic powders having different particle sizes, or from at least one ceramic powder and at least one solution, which contains precursors of a ceramic material, through addition of additive, sintering agent, shaping agent, bonding agent, or dispersion agent, where particle size of the additives is not greater that the greatest particle size of the ceramic powder;
• forming at least one first partial layer out of one of the suspensions, and then entirely or partially removing dispersion fluid;
• forming at least one second partial layer comprised of the other suspension or solution, and entirely or partially removing dispersion fluid or solvent;
• forming at least one layer by at least one of superposing and attaching the at least one first partial layer and the least one second partial layer;
• embossing the at least one layer to form at least one embossed layer;
• attaching the at least one embossed layer at least at points and by material adhesion to at least one layer to form a flat ceramic membrane having channels whose cross-sections have arbitrary geometries;
• and
• sintering the flat ceramic membrane with the proviso that not all of the membrane components are sintered.