Abstract: A modular element having a high-temperature stable main body, including at least one metallic or ceramic plate, which has at least one through-going aperture for the insertion of a ceramic capillary membrane and at least one potting in the form of a sufficiently gas-tight and high-temperature stable joint between the metallic or ceramic plate and the ceramic capillary membrane. The through-going aperture of the metallic or ceramic plate having an extension for accommodating the sufficiently gas-tight and high-temperature stable joint on at least one side of the metallic or ceramic plate.

Abstract: A modular element having a high-temperature stable main body, including at least one metallic or ceramic plate, which has at least one through-going aperture for the insertion of a ceramic capillary membrane and at least one potting in the form of a sufficiently gas-tight and high-temperature stable joint between the metallic or ceramic plate and the ceramic capillary membrane. The through-going aperture of the metallic or ceramic plate having an extension for accommodating the sufficiently gas-tight and high-temperature stable joint on at least one side of the metallic or ceramic plate.

Abstract: A porously coated, densely sintered ceramic membrane, which can be produced from a green membrane and subsequent sintering. The membrane is coated with ceramic material, which contains noble metals, which can be produced by application and subsequent thermal treatment. The noble metals are contained at a concentration of 2.5 to 5 mass percent.

Abstract: High-temperature-resistant devitrifying solder glasses that contain 20-45 mol % BaO, 40-60 mol % SiO2, 0-30 mol % ZnO, 0-10 mol % Al2O3, 0-5 mol % BaF2, 0-2 mol % MgO, 0-2 mol % CaO, 0-2 mol % TiO2 and 0-10 mol % B2O3, as well as 0.5-4 mol % M2O3 (M=Y, La or rare earth metals) and/or 0.5-4 mol % ZrO2. The application, of said solder glasses are also disclosed.

Abstract: Composites comprising at least one hollow fiber of oxygen-transporting ceramic material, which is a ceramic material which conducts oxygen anions and electrons or a combination of ceramic material which conducts oxygen anions and a ceramic or nonceramic material which conducts electrons, with the outer surface of the hollow fiber being in contact with the outer surface of the same hollow fiber or another hollow fiber and the contact points being joined by sintering, are described. Further composites comprise at least one hollow fiber of oxygen-transporting ceramic material which is a ceramic material which conducts oxygen anions and electrons or a combination of ceramic material which conducts oxygen anions and ceramic or nonceramic material which conducts electrons and a connection element for the introduction or discharge of fluids at at least one end face, with hollow fibers and connection element being joined.

Abstract: A process for enriching the content of oxygen in oxygen- and nitrogen-containing gases in a separation apparatus which has an interior which is divided into a substrate chamber and into a permeate chamber by an oxygen-conducting ceramic membrane is described. The process comprises the introduction of oxygen- and nitrogen-containing sweep gas into the permeate chamber and the establishment of a pressure in the substrate chamber so that the oxygen partial pressure in substrate chamber and sweep chamber results in the transfer of oxygen through the ceramic membrane. The process is distinguished by high operational safety.

Abstract: Composites comprising at least one hollow fibre of oxygen-transporting ceramic material, which is a ceramic material which conducts oxygen anions and electrons or a combination of ceramic material which conducts oxygen anions and a ceramic or nonceramic material which conducts electrons, with the outer surface of the hollow fibre being in contact with the outer surface of the same hollow fibre or another hollow fibre and the contact points being joined by sintering, are described. Further composites comprise at least one hollow fibre of oxygen-transporting ceramic material which is a ceramic material which conducts oxygen anions and electrons or a combination of ceramic material which conducts oxygen anions and ceramic or nonceramic material which conducts electrons and a connection element for the introduction or discharge of fluids at at least one end face, with hollow fibres and connection element being joined.