Abstract: Indium-tin mixed oxide powder which consists of primary particle aggregates and contains 50 to 90% by weight indium oxide, calculated as In2O3, and 10 to 50% by weight tin oxide, calculated as SnO2. It is produced by atomising a solution of an inorganic indium compound and an organic tin compound and burning it in a flame. It may be used for the production of electrically conductive paints and coatings, solar cells and IR and UV absorbers and in medical technology.

Abstract: The invention relates to plastics composite mouldings obtainable via welding in an alternating electromagnetic field, in which the weld is obtained with the aid of a plastics material which comprises nano-scale, magnetic oxidic particles, which are composed of aggregated primary particles, and where the primary particles are composed of magnetic metal oxide domains whose diameter is from 2 to 100 nm in a non-magnetic metal oxide matrix or non-magnetic metalloid oxide matrix.

Abstract: Rubber compound containing at least one nanoscale, magnetic filler and at least one non-magnetic filler. Vulcanisable mixture containing the rubber compound and at least one crosslinking agent and/or vulcanisation accelerator. Moulding obtainable from the vulcanisable mixture by heat treatment or action of an electrical, magnetic or electromagnetic alternating field.

Abstract: Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m2/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

Abstract: In a spray gun (1) for spraying paint with a gun housing (2) provided with a handle (3) with a union nut (10) screwed onto it that holds an air cap (11) provided with offset outlet openings (14, 15) for compressed air, the union nut (10) is positively connected to the air cap (11) in a circumferential direction. This embodiment makes it possible for the spray jet to be set in a brief time and without difficulties without having to put up with getting dirty. It is merely necessary to turn the union nut (10) accordingly in order to control the air supply to the outlet openings (14, 15) of the air cap (11) and therefore to influence the formation of the spray jet.

Abstract: Zinc oxide powder is prepared by a process having the following steps a) generating of a zinc vapor-containing stream in a vaporization zone; b) oxidizing the zinc vapor by reaction with an oxygen-containing gas thereby forming zinc oxide powder in an oxidation zone; and c) cooling of the reaction mixture with water or an inert gas, and separation of the zinc oxide powder in a cooling/isolation zone, wherein aa) in the vaporization zone, a gas stream of an inert gas and a fuel gas is passed through a zinc melt which has a temperature of 450 to <900° C., thereby forming zinc vapor, the content of fuel gas being 1 to 50 vol. %, based on the sum of inert gas and fuel gas, and the molar quotient of zinc vapor to fuel gas being 0.01 to 50, and bb) in the oxidation zone, a second gas stream, which contains an oxygen-containing gas and steam, is added to the gas stream of zinc vapor, fuel gas and inert gas in an amount such that the temperature in the oxidation zone is from 500 to 1100° C.

Abstract: Aggregated, crystalline silicon powder with a BET surface of more than 50 m2/g. The powder is produced by continuously feeding at least one vaporous or gaseous silane and optionally at least one vaporous or gaseous doping substance and an inert gas into a reactor and mixing the components there, wherein the proportion of silane is between 0.1 and 90 wt. % referred to the sum total of silane, doping substance and inert gas, the mixture is caused to react by input of energy, wherein a plasma is produced by the input of energy by means of electromagnetic radiation in the microwave range at a pressure of 10 to 1100 mbar, the reaction mixture is allowed to cool and the reaction product is separated in the form of a powder from gaseous substances. The powder may be used for the production of electronic components.

Abstract: Composite particles useful for absorbing in the UV-A and UV-B regions contain a zinc oxide matrix and cerium oxide domains, wherein the domains are located in and on the matrix, wherein a fraction of zinc oxide is 80 to 98% by weight and a fraction of cerium oxide is 2 to 20% by weight, in each case based on the composite particles, and wherein a BET surface area of said composite particles is from 5 to 100 m2/g.

Abstract: Pyrogenically prepared, doped zinc oxide powder, wherein the doping component comprises at least one oxide from the group aluminum, gallium, indium, germanium, tin and is present in the doped zinc oxide powder in an amount of from 0.005 to 15 wt. %, and wherein the doped zinc oxide powder is in the form of aggregates of primary particles having a mean maximum diameter of from 30 to 400 nm. It is prepared by oxidation from zinc powder and at least one doping agent, wherein the process zones vaporisation, nucleation, oxidation and quenching are passed through and the doping agent is metered in in the nucleation zone, in which the temperature is below the boiling temperature of zinc. The doped zinc oxide powder can be used in electrically conductive lacquers and coatings.

Abstract: Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m2/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

Abstract: Pyrogenically prepared, doped zinc oxide powder, wherein the doping component comprises at least one oxide from the group aluminum, gallium, indium, germanium, tin and is present in the doped zinc oxide powder in an amount of from 0.005 to 15 wt. %, and wherein the doped zinc oxide powder is in the form of aggregates of primary particles having a mean maximum diameter of from 30 to 400 nm. It is prepared by oxidation from zinc powder and at least one doping agent, wherein the process zones vaporisation, nucleation, oxidation and quenching are passed through and the doping agent is metered in in the nucleation zone, in which the temperature is below the boiling temperature of zinc. The doped zinc oxide powder can be used in electrically conductive lacquers and coatings.

Abstract: The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Abstract: A spray gun for atomizing fluid with compressed air comprises a housing having a handle, an atomizer nozzle, a guide sleeve having a U-shaped cross section which engages in the atomizer nozzle and is supported in the housing, and a valve needle which can be operated by means of a trigger which is in a pivoting mounting. The valve needle is connected with the trigger in the area of the guide sleeve by means of a hinge pin. A seal disposed in the guide sleeve, the seal being located between a feed line and the hinge pin, with the valve needle being held in a movable arrangement in the seal.

Abstract: Composite powder with a matrix domain structure, in which

Abstract: An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m2/g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m3 using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).

Abstract: Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.

Abstract: In a spray gun (1) for atomizing fluid media with the help of compressed air consisting of a housing (11) with a handle (14) and an atomizer nozzle (19), of a guide sleeve which engages in the atomizer nozzle (19) and is supported in the housing (11), as well as of a valve needle (31) which can be operated by means of a trigger handle (26) which is in a pivoting mounting, the valve needle (31) is located in a positive connection with the trigger handle (26) in the area of the guide sleeve (21) by means of a hinge pin (27′). Furthermore, a seal (32) is inserted in the guide sleeve (21) with a U-shaped cross section, the seal (32) being located between a feed line (16) and the hinge pin (27′), with the valve needle (31) being held in a movable arrangement in the seal (32).

Abstract: An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m2/g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m3 using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).

Abstract: Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.

Abstract: A process for preparing grit blasting particles coated with titanium dioxide by sinter-fusing titanium dioxide on the surface of grit blasting particles made of a base material. A mixture of finely divided titanium dioxide and grit blasting particles is passed continuously through the flame in a flame reactor, with the aid of conveying air, wherein the titanium dioxide is sinter-fused on the surface of the grit blasting particles over an average residence time of 0.1 to 5 seconds in a temperature range from 600 to 1200° C. An increase in the adhesive bond between metal framework and a facing material made of plastics in dentures can be achieved when metal framework is grit blasted with a grit blasting agent containing titanium dioxide coated grit blasting particles and then the grit blasted and titanium dioxide coated surface is treated with a silane bonding agent.