Patents

PROBLEM TO BE SOLVED: To provide polymeric microparticles high in monodispersibility with their sizes falling within a predetermined range, to provide a method for producing such polymeric microparticles, and to provide polymeric microparticles of a special shape formable by utilizing an electrostatic spraying technique, and to provide a method for producing the polymeric microparticles. ;SOLUTION: The polymeric microparticles are 0.1-10 μm in average size with the geometric standard deviation being 1.2 or less. Also, the polymeric microparticles is 0.1-10 μm in average size, having uneven surfaces. Such polymeric microparticles are produced by conducting an electrostatic spraying of a solution of the corresponding polymer with a predetermined concentration of c at the ratio: predetermined spraying amount to electrical conductance Q/k (wherein, k is the electrical conductance of the solution to be sprayed; Q is the amount of the solution to be sprayed per unit time; and c is the concentration of the polymer in the solution)

PROBLEM TO BE SOLVED: To provide a recoverable, recyclable titanium dioxide microparticle which is a secondary particle comprising titanium dioxide nanoparticles as primary particles and has a photocatalytic activity equivalent to that of the titanium dioxide nanoparticle, and its production method. ;SOLUTION: The titanium dioxide microparticle is a fired product of the titanium dioxide nanoparticle, has a plurality of spherical voids and has a photocatalytic activity. Preferably, the outer diameter of the titanium dioxide microparticle is 0.1-5 μm, and the diameter of the spherical void is 50-1,000 nm. The titanium dioxide microparticle can be produced through a step of preparing a mixed precursor of the titanium dioxide nanoparticle and a polymer particle, a step of preparing an aqueous suspension of the precursor and a step of spraying the suspension and heating and drying the sprayed droplets

PROBLEM TO BE SOLVED: To provide a micro-wiring fabricating method setting a burning temperature of micro wirings, which are painted by inkjet printing method or the like using a conductive paste comprised of copper nanoparticles, to 250°C or lower at which a resin substrate can be used. ;SOLUTION: The micro-wiring fabricating method fabricates micro wirings first by oxidation-processing and then by reduction-processing the conductive paste, which comprises copper nanoparticles, a dispersant, and a binder and which is painted on a substrate according to a wiring pattern, wherein the oxidation processing of the substrate is performed at a temperature exceeding an oxidation start temperature that is required by a thermal analysis in the oxidation processing and reduction processing of the copper nanoparticles, and the reduction processing of the substrate is performed at a temperature exceeding a reduction start temperature. 

PROBLEM TO BE SOLVED: To provide a method for producing an inorganic fiber sheet having a certain amount of area and capable of sufficiently making use of fiber characteristics. SOLUTION: The method includes: a preparation process for preparing a spinning solution by dissolving an inorganic salt or salts and a polymer in a solvent; a spinning process for spinning the spinning solution; a collection process for collecting the spun fibers on a base material carriable and removable by burning; a carrying process for carrying the collected fibers to a burning apparatus together with the base material and a burning process for burning the carried base material and fibers, and the processes from the spinning process to the carrying process are carried out under an atmosphere having ≤35% relative humidity.

M-C-N-O based phosphors having high emission intensity are provided without using heavy metals, rare metals, and special activator agents. Colors of the M-C-N-O based phosphors can be changed by adjusting a peak top of an emission spectrum. Highly environmentally-compatible polymer dispersions, inorganic EL devices, light emitting devices, fluorescent tubes, and the like are also provided, which use the M-C-N-O based phosphors. The M-C-N-O based phosphors of the present invention comprise a group IIIB element (M), carbon (C), nitrogen (N), and oxygen (O). Colors are changed by changing an amount of carbon (C) contained in the M-C-N-O based phosphors. The polymer dispersions, inorganic EL devices, light emitting devices, and fluorescent tubes are produced using the M-C-N-O based phosphors.

PROBLEM TO BE SOLVED: To provide a novel Al-C-N-O-based fluorescent substance which can emit light from purple to red by controlling the carbon content. ;SOLUTION: The Al-C-N-O-based fluorescent substance comprises Al-C-N-O. The Al-C-N-O-based fluorescent substance can be obtained by heating at 500 to 1,200°C a solution in which a compound containing aluminum, a compound containing nitrogen, and an organic compound composed of carbon, hydrogen and oxygen are dissolved and mixed in water or/and an organic solvent.

ABSTRACT. A method of producing an M-C-N-O based phosphor with reduced non-uniform emission and improved color purity is provided. The method of producing an M-C-N-O based phosphor comprising a group IIIB element (M), carbon (C), nitrogen (N) and oxygen (O) comprises: heating a mixture comprising a group IIIB element-containing compound and a nitrogen-containing organic compound to form a pyrolysate; disintegrating the resulting pyrolysate-containing product; and firing the disintegrated product.

PROBLEM TO BE SOLVED: To provide a method for producing mesoporous silica nanoparticles by which particle diameter and mesopore size are more easily controlled than by a conventional method and spherical, monodisperse and highly homogeneous mesoporous silica nanoparticles are easily obtained. SOLUTION: The method for producing mesoporous silica nanoparticles includes: (1) a step 1 where in an emulsion solution containing a surfactant, water and a hydrophobic solvent, the following step A and step B are carried out simultaneously or sequentially to obtain polymer-silica composite particles which are composite particles of polymer particles and silica particles; step A: a step of forming polymer particles by adding a monomer and a polymerization initiator, step B: a step of forming silica particles by adding a silica source which produces a silanol compound upon hydrolysis and a basic catalyst and bringing the silanol compound into hydrolysis-dehydration condensation; and (2) a step 2 of removing the organic component from the polymer-silica composite particles.

PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrode capable of manufacturing a dye-sensitized solar cell superior in conversion efficiency, the electrode for the dye-sensitized solar cell obtained by this manufacturing method, and the dye-sensitized solar cell equipped with this electrode.SOLUTION: This manufacturing method of the electrode for the dye-sensitized solar cell is equipped with a process in which a fiber sheet is formed by spinning a metal oxide precursor containing solution, a process in which a first adhesive solution to contain the same metal oxide precursor and polymer as those in the metal oxide precursor to contain the solution is imparted to a transparent conductive substrate and a first adhesive layer is formed, a process in which an adhesive auxiliary solution composed of the same polymer as that to compose the metal oxide precursor containing solution is imparted to the first adhesive layer, and after the adhesive auxiliary layer is formed, the fiber sheet is laminated on the adhesive auxiliary layer, and a second adhesive layer of the same as the first adhesive layer is imparted to the fiber sheet and the second adhesive layer is formed by one or more times, and a process in which afterwards calcination is carried out, and the fiber sheet is joined and integrated on the transparent conductive substrate.

PROBLEM TO BE SOLVED: To provide a method for producing core-shell particles in which the surface of metal particles are favorably coated with metal oxide particles.SOLUTION: Slurry spray liquid in which the metal particles used as the core particle and metal oxide particles as shell sources are dispersed is sprayed, and by heating and spraying/drying the sprayed droplets, particles obtained after spraying/drying are collected. In such spraying/drying, the spray liquid is provided so that the surface charge of the metal particles in the spray liquid and that of the metal oxide particles have opposite signs each other, and thereby, the metal oxide particles are uniformly adhered to the metal particle surface to coat the metal particles.

PROBLEM TO BE SOLVED: To provide a method for manufacturing mono dispersion capsule type particles in which a content of impurity is little, and the capsule type particles obtained by the manufacturing method.SOLUTION: The method for manufacturing capsule type particles is characterized in that electrostatic spray of a dispersion containing fine particles to be cores and a resin component to be shells is carried out, and thereby the monodispersive capsule type particles having one or more cores are obtained. 

ABSTRACT. The present invention provides an Al--C--O based phosphor using neither heavy metal nor rare metal and composed of elements with high environmental compatibility and excellent economic efficiency, wherein the wavelength of the peak intensity of the emission spectrum can be changed without changing the basic composition. An aluminum oxide phosphor which comprises aluminum (Al), carbon (C), and oxygen (O) respectively in an amount of 30 mol %<Al<60 mol %, 0 mol %<C<10 mol %, 30 mol %<O<70 mol % is provided. The above problem is solved in the production of an Al--C--O phosphor comprising aluminum (Al), carbon (C), and oxygen (O) by heating and firing a mixture comprising an aluminum-containing compound and a coordinatable oxygen-containing compound.