Abstract: A composition for producing a layer or a coating, especially a mold release layer, includes aluminum titanate and/or silicon nitride, an oxidic inorganic component and a binder comprising nanoscale particles.

Abstract: A method of counteracting crystalline deposits on a surface includes applying a sprayable low-viscosity suspension including a binder system including at least one organosilicon constituent selected from the group consisting of alkylpolysiloxane, alkylsilicone resin and phenylsilicone resin; ceramic particles; hexagonal boron nitride particles; optionally, process additives; and at least one solvent to the surface and curing the suspension.

Abstract: This specification describes the use of a composition comprising a nanoscale powder, a porous ceramic powder and a solvent for protecting a metallic surface against chemical attacks at high temperatures, in particular in a reducing and/or carburizing atmosphere, and also a corresponding process. Furthermore, this specification describes a plant part having a metallic surface which, in the operating state, is exposed to a reducing and/or carburizing atmosphere, wherein the surface is coated with a porous protective coating having a specific surface area of at least 20 m2/g.

Abstract: A filtration appliance for wastewater purification, preferably for a sewage treatment plant, in particular for a small sewage treatment plant, including at least one ceramic-based membrane for separating off microorganisms, to a sewage treatment plant having such a filtration appliance, a method of purifying wastewater, in particular in a sewage treatment plant, wherein microorganisms present in the wastewater are separated off by means of at least one ceramic-based membrane, and also to the use of a ceramic-based membrane as filter for separating off microorganisms and, if appropriate, fine solids, from wastewaters.

Abstract: The invention relates to a method for producing ceramic hollow fibers from nanoscale particles and to hollow fibers produced in such a manner. The inventive method is characterized in that the ceramic material has a solids content of >25% by volume, preferably >30% by volume and is processed by means of extrusion and spinning. The hollow fiber is sintered according to conventional sintering methods. A hollow fiber produced in this manner is used for metal, polymer and ceramic matrix reinforcements, for artificial organs, for microsystems technology components, for fiber optical waveguides, for ceramic membranes, for solid electrolyte in fuel cells (SOFC), for tissue engineering and for producing extremely light ceramic parts, such as heat shields or brake systems, that are subjected to temperature stresses. The inventive ceramic batch can also be processed by means of silk screening whereby resulting in the production of filigree structures over the ceramic silk screening.

Abstract: A process for producing a mold includes introducing a composition including a particulate, refractory material and a binder into a hollow model having an interior cavity which determines contours of all surfaces of the mold or a mold part, wherein the model includes at least two separate parts to permit removal of the mold, and applying a second composition containing at least one organosilicon component and at least one solvent to at least one of the separable parts before use.

Abstract: A composition for producing a layer or coating which is stable at high temperatures includes water glass, at least one glass frit, hard material particles and solvent.

Abstract: A composition for producing a layer or a coating, especially a mold release layer, includes aluminum titanate and/or silicon nitride, an oxidic inorganic component and a binder comprising nanoscale particles.

Abstract: A filtration appliance for wastewater purification, preferably for a sewage treatment plant, in particular for a small sewage treatment plant, including at least one ceramic-based membrane for separating off microorganisms, to a sewage treatment plant having such a filtration appliance, a method of purifying wastewater, in particular in a sewage treatment plant, wherein microorganisms present in the wastewater are separated off by means of at least one ceramic-based membrane, and also to the use of a ceramic-based membrane as filter for separating off microorganisms and, if appropriate, fine solids, from wastewaters.

Abstract: A composition includes particles of an inorganic component A and particles of an inorganic component B which together can form a eutectic system and react at least partly with one another at a sintering temperature, resulting in formation of at least one ternary chemical compound of the spinel type. The composition can be applied to high-temperature-stable ceramic layers, coatings and shaped bodies and also their production, their uses and compositions for producing them.

Abstract: The invention relates to nanoscale rutile or oxide powder that is obtained by producing amorphous TiO2 by mixing an alcoholic solution with a titanium alcoholate and with an aluminum alcohalate and adding water and acid. The amorphous, aluminum-containing TiO2 is isolated by removing the solvent, and is redispersed in water in the presence of a tin salt. Thermal or hydrothermal post-processing yields rutile or oxide that can be redispersed to primary particle size. The n-rutile or the obtained oxide having a primary particle size ranging between 5 and 20 nm can be incorporated into all organic matrices so that they remain transparent. Photocatalytic activity is suppressed by lattice doping with trivalent ions. If the amorphous precursor is redispersed in alcohol, or not isolated, but immediately crystallized, an anatase is obtained that can be redispersed to primary particle size.

Abstract: A layer or coating which counteracts crystalline deposits on a substrate includes a matrix composed of a binder system and ceramic particles, and also boron nitride in particle form, wherein the boron nitride particles are incorporated into the matrix and are distributed essentially homogeneously therein.

Abstract: A method for producing a ceramic coating of metallic and/or ceramic surfaces and products in reactors, process plants and combustion plants includes applying a mixture of fine-particle boron nitride, at least one inorganic binding agent of medium particle size in the nanometer range, containing substantially Al2O3, AlO(OH), ZrO2, Y—ZrO2, TiO2, Fe2O3 and/or SnO2 or an associated precursor compound and at least one solvent and/or water onto a metallic and/or ceramic surfaces or product, and burning the applied mixture into a coating through heating.

Abstract: An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water.

Abstract: In a ceramic filter element 10 for purifying water, the element is formed by a tubular body, which comprises at least one wall 11 and has at least one through opening 12 extending along the entire length of the tubular body. The wall 11 is implemented as a functional layer or as a carrier having a functional coating and either the water to be filtered flows, under pressurize, through the outer surface 18 and discharges into the through opening 12 or the water to be filtered flows, under pressurized, from the inner surface 17 of the through opening 12 to the outer surface 18 of the ceramic filter element 10.

Abstract: An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of <100 nm and at least one solvent. The inorganic compounds are preferably compounds selected from the group consisting of the chalcogenides, the carbides and/or the nitrides. Further preference is given to the mean particle size being <50 nm, in particular <25 nm. The solvent is, in particular, a polar solvent, especially water.

Abstract: The invention concerns a method for producing a highly-porous ceramic layer and for application of this layer onto metallic, ceramic, enameled and/or glass substrates using porous, ceramic particles, preferably aluminum oxide, titanium oxide and zircon oxide, and an inorganic binder system. The inorganic binder system contains at least one ceramic nanoparticle of a particle size of less than 100 nm, preferably less than 50 nm and particularly preferred less than 25 nm, the solvent being water. Layers produced in this fashion are suited as self-cleaning catalytically active layers e.g. in ovens, in combustion engines etc. or for general coating of substances to considerably increase their specific surface e.g. for catalytic substrates.

Abstract: In a method for producing a structured inorganic layer (1), in particular, a ceramic layer, a structure is introduced on the surface of a green layer through mechanical processing, and the green layer is subsequently sintered. This procedure permits precise control of the position and dimensions of the structures.

Abstract: In a method for producing a ceramic compound, a green second layer having ceramic particles of a size of x?100 nm is disposed onto a green carrier layer. During sintering together of the green layers, the second layer is compacted into a flawless, fine-pored functional layer.

Abstract: A composition containing transparent thermoplastic polymers and a surface modified oxide particles is disclosed. The size of the particles is less than 200 nm and the composition is suitable for the preparation of products wherever diathermancy is undesirable.