Abstract: The powder paint feeder for powder coating directly is installed to a powder paint tank of a fluidized bed type. In the powder paint feeder, a cylindrical screw casing is inserted into the powder paint tank and fixed thereto and has an introducing port into which the powder paint fluidized in the powder paint tank is introduced and a discharging port through which the powder paint dispersed externally of the powder paint tank is discharged. A screw is accommodated in the screw casing and feeds the powder paint introduced from the introducing port to the discharging port while compacting it. A deaerating device is disposed to the screw casing and deaerates the fluidized powder paint to accelerate the compaction of the powder paint. A dispersing blade is mounted on the rotational shaft of the screw in the vicinity of the discharging port downstream of the screw for dispersing the compacted powder paint. A driving device rotates the rotational shaft of the screw.

Abstract: A process for producing a ceramic-base sinter, comprising sintering coated ceramic particles wherein the particles are prepared for sintering by the steps of: dispersing a powder of ceramic core particles in a gaseous atmosphere to form a mixture of a gas and particles in a powder of highly dispersed core particles; charging a precursor for the coat forming substance that has been formed via the vapor phase and/or a precursor for the coat forming substance in a vapor-phase state and the mixture of the gas and the powder of highly dispersed core particles that have a predetermined dispersity according to the average diameter of the core particles in a coating start region of a coating space; coating the surfaces of the core particles with the coat forming substance by allowing the precursor to contact and/or impinge against the core particles; shaping and sintering the thus coated ceramic core particles or a mixture containing them under appropriate sintering conditions.

Abstract: A process for producing a metal-base sinter, comprising sintering coated metal particles wherein the particles are prepared for sintering by the steps of: dispersing a powder of metal core particles in a gaseous atmosphere to form a mixture of a gas and particles in a powder of highly dispersed core particles; charging a precursor for the coat forming substance that has been formed via the vapor phase and/or a precursor for the coat forming substance in a vapor-phase state and the mixture of the gas and the powder of highly dispersed core particles that have a predetermined dispersity according to the average diameter of the core particles in a coating start region of a coating space; coating the surfaces of the core particles with the coat forming substance by allowing the precursor to contact and/or impinge against the core particles; shaping and sintering the thus coated metal core particles or a mixture containing them under appropriate sintering conditions.

Abstract: The process for producing coated particles of the present invention is applicable to a process of producing coated particles by charging powder of core particles into the coating space and permitting a coat forming substance generated via a vapor phase or being in a vapor-phase state to contact against particles of the powder, and the process is characterized by dispersing powder of core particles having an average particle diameter of not more than 10 .mu.m and a particle size distribution of ((D.sub.M /5, 5D.sub.M), .gtoreq.90%) to adjust a dispersity .beta. to at least 70%, and contacting the dispersed powder of the core particles with the coat forming substance.

Abstract: Disclosed is a fiber of an organic, inorganic or metallic material or a simple substance wherein ultrafines of an inorganic or metallic material or a simple substance having an average particle diameter of 0.005-1 .mu.m are uniformly dispersed and deposited on 8-90% of the surface in a single layer. The fiber is produced by exposing a fiber of an organic, inorganic or metallic material or a simple substance to a gaseous stream forming ultrafines of an inorganic or metallic material or a simple substance by a vapor phase process, thereby contacting said ultrafines in the gaseous stream with said fiber in a state wherein the ultrafines are still active. The treated fiber is useful as a reinforcing material for a fiber reinforced composite.

Abstract: A powder of diamond or high-pressure phase boron nitride core particles charged into a coating space as it is dispersed, and a precursor of a coat forming substance allowed to contact and/or impinge against the particles in the powder of core particles so that their surfaces are covered with the coat forming substance, thereby preparing coated diamond or high-pressure phase boron nitride particles which are subsequently sintered. The thusly produced diamond of high-pressure phase boron nitride sinter is composed of coated core particles of high performance that are superhard, uniform, dense and sintered firmly, and which have a controlled microstructure.

Abstract: A particle of an inorganic or metallic material which is coated on the surface with ultrafines of an inorganic or metallic material. The coated particle is produced by introducing the particles of the inorganic or metallic material to be coated into a stream carrying the ultrafines of the inorganic or metallic material formed in a vapor phase and bringing the particles to be coated into contact with said ultrafines in a fluidized state. The coated particles are used for the production of a sintered product.