Abstract: The method of producing an electrode catalyst having a porous carbon support that has nanopores having a pore diameter of 1 to 20 nm and a BET specific surface area of 700 to 900 m2/g, and catalyst particles containing Pt supported on the support, includes: a first step for preparing a powder in which the catalyst particles are supported on the support; and a second step for accommodating the powder obtained through the first step in a flow-type reactor, flowing NH3 gas through the reactor under conditions of a concentration of 10 to 100% and a pressure of 0.1 MPa to 0.5 MPa, and regulating the temperature in the reactor to 500° C. or more and less than the decomposition temperature of ammonia, keeping for 5 to 10 hours to chemically react the powder and the NH3 gas.

Abstract: The method produces an electrode catalyst having a porous carbon support that has nanopores having a pore diameter of 1 to 20 nm, micropores having a pore diameter of less than 1 nm, and a BET specific surface area of 1000 to 1500 m2/g, and catalyst particles containing Pt supported on the support, including: preparing a powder in which the catalyst particles are supported on the support by using the support and raw materials of the catalyst particle; and accommodating the powder obtained through the first step in a flow-type reactor, flowing ammonia gas through the reactor under conditions of a concentration of 10 to 100% and a pressure of 0.1 MPa to 0.5 MPa, and regulating the temperature in the reactor to 500° C. or more and less than the decomposition temperature of ammonia, keeping for 5 to 10 hours to chemically react the powder and the ammonia gas.

Abstract: Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.

Abstract: Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.

Abstract: A laser cutting machine in which a laser beam is condensed by a machining lens, and while the laser beam thus condensed is being applied to a workpiece, the laser beam and the workpiece are moved relative to each other, to cut the workpiece, the laser cutting machine comprising optical axis moving means for moving the laser beam applied to the machining lens in parallel with an optical axis to a desired position on the machining lens, and optical axis movement control means for controlling the optical axis moving means in conformance with a program provided for a cutting locus to control the relative movement of the condensed laser beam and workpiece, so that the laser cutting machine which is not expensive, and can form a cut in a workpiece in such a manner that the cut is not tapered in section, without lowering the machining accuracy is obtained.