Abstract: An aspect of the present invention relates to magnetic powder, which is magnetoplumbite hexagonal strontium ferrite magnetic powder comprising 0.05 atomic percent to 3 atomic percent of Ca per 100 atomic percent of Fe, but comprising no rare earth elements or transition metal elements other than Fe, the average particle size of which ranges from 10 nm to 25 nm, and which is magnetic powder for magnetic recording.

Abstract: The method of manufacturing hexagonal ferrite powder includes preparing a hexagonal ferrite precursor by mixing an iron salt and a divalent metal salt in a water-based solution, and converting the hexagonal ferrite precursor into hexagonal ferrite within a reaction flow passage, within which a fluid flowing therein is subjected to heating and pressurizing, by continuously feeding a water-based solution containing the hexagonal ferrite precursor and gelatin to the reaction flow passage.

Abstract: A production method for metal oxide particles includes: obtaining precursor particles of a metal oxide by performing a synthesis reaction of the precursor particles in the presence of an organic compound; and converting the obtained precursor particles into metal oxide particles by heating an aqueous solution containing the precursor particles to 300° C. or higher and pressurizing the aqueous solution at a pressure of 20 MPa or higher.

Abstract: Provided are hexagonal ferrite magnetic powder for magnetic recording, being comprised of hexagonal ferrite magnetic particles having a crystalline metal oxide adhered to a surface thereof, a method for producing hexagonal ferrite magnetic particles having a crystalline metal oxide adhered to a surface thereof, and a magnetic recording medium.

Abstract: An aspect of the present invention relates to A method of manufacturing hexagonal ferrite powder, which comprises heating to equal to or higher than 300° C. and pressurizing to equal to or higher than 20 MPa a hexagonal ferrite precursor-containing water-based solution, to convert the precursor to hexagonal ferrite, wherein the water-based solution comprises at least a reducing compound selected from the group consisting of a reducing inorganic compound and a reducing organic compound that have a reducing property and exist as a solid or a liquid at ordinary temperature and ordinary pressure, as well as, when the reducing compound is a reducing inorganic compound, the water-based solution further comprises an organic compound.

Abstract: An aspect of the present invention relates to magnetic powder, which is magnetoplumbite hexagonal strontium ferrite magnetic powder comprising 1 atomic percent to 5 atomic percent of Ba per 100 atomic percent of Fe, the average particle size of which ranges from 10 nm to 25 nm, and which is magnetic powder for magnetic recording.

Abstract: An aspect of the present invention relates to magnetic powder, which is magnetoplumbite hexagonal strontium ferrite magnetic powder comprising 0.05 atomic percent to 3 atomic percent of Ca per 100 atomic percent of Fe, but comprising no rare earth elements or transition metal elements other than Fe, the average particle size of which ranges from 10 nm to 25 nm, and which is magnetic powder for magnetic recording.

Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, the ferromagnetic hexagonal ferrite powder has an activation volume ranging from 800 nm3 to 1,300 nm3, and 1 percent to 50 percent of particles constituting the ferromagnetic hexagonal ferrite powder are ferromagnetic hexagonal ferrite particles, each of which has an indentation with a depth of equal to or more than 1/10 of an equivalent projected circle diameter of the ferromagnetic hexagonal ferrite particle.

Abstract: A dispersion-type electroluminescence device is provided, the dispersion-type electroluminescence device including: a pair of electrodes including a transparent electrode and a back electrode; and at least a light emitting layer provided between the pair of electrodes, the light emitting layer containing phosphor particles, wherein the phosphor particles have D10 of more than 10 ?m, D90 of less than 32 ?m, and a D90/D10 value of less than 2.40, where D10 and D90 are particle diameters at 10% and 90% values in cumulative distribution of particle size distribution.

Abstract: A dispersion-type electroluminescence device is provided, the dispersion-type electroluminescence device including: a pair of electrodes including a transparent electrode and a back electrode; and at least a light emitting layer provided between the pair of electrodes, the light emitting layer containing phosphor particles, wherein the phosphor particles have D10 of more than 10 ?m, D90 of less than 32 ?m, and a D90/D10 value of less than 2.40, where D10 and D90 are particle diameters at 10% and 90% values in cumulative distribution of particle size distribution.

Abstract: A solar battery element has a structure equipped with: photoelectric converting semiconductor particles formed by a particulate base substance, semiconductor layers of a first conductive type formed by a material different from that of the particulate base substance that cover at least portions of the particulate base substance, and semiconductor layers of a second conductive type that cover portions of the semiconductor layers of the first conductive type so as to form pn junctions therewith; a first electrode that contacts the semiconductor layers of the first conductive type; a second electrode that contacts the semiconductor layers of the second conductive type; and an insulating binder for immobilizing the photoelectric converting semiconductor particles between the first electrode and the second electrode.

Abstract: A photoelectric conversion device includes: a photoelectric conversion layer containing a semiconductor and having a first surface as a light absorption surface and a second surface opposite to the first surface; a first electrode formed substantially in contact with the first surface; and a second electrode formed substantially in contact with the second surface. The photoelectric conversion layer is a monograin film of semiconductor grains which are monograin film of separate semiconductor grains which are arranged substantially in a single layer and each of which is at least partially buried in a binder layer, the semiconductor grains have a photoelectric conversion property and an average diameter in the range from one micrometer to 60 micrometers, and each of at least part of the semiconductor grains contains at least one stacking fault.

Abstract: A surface emitting-type electroluminescent device capable of being driven by a DC power source and excellent in durability is provided. A surface emitting-type electroluminescent device containing a stacked structure in which a transparent electrical conductor layer, a transparent semiconductor layer and/or a transparent insulator layer, a light-emitting layer and a back electrode layer are arrayed in this order, the transparent electrical conductor layer, the transparent semiconductor layer and the transparent insulator layer each containing a metal oxide.

Abstract: An image-taking system includes an image-taking device which takes an image of a subject; a flashing device which emits a flash to the subject; an illumination device which has a surface positioned opposite the image-taking device and which illuminates the subject interposed between the image-taking device and the surface with light emitted from the surface. The system further includes a background replacement device which acquires a plurality of images of the subject taken by the image-taking device under a respective plurality of image-taking-light conditions created by the flashing device and the illumination device, discriminates between the subject and a background in a taken image based on the acquired images, and replaces the background with another background.

Abstract: An inorganic electroluminescent device is provided, the inorganic electroluminescent device including: a multilayer structure containing at least one pair of electrodes, and a light-emitting layer provided between the electrodes, the light-emitting layer contains at least one matrix material, at least one element forming a luminescent center, and Cu, wherein the matrix material is selected from the group consisting of II Group-XVI Group compounds, XII Group-XVI Group compounds, and mixed crystals thereof, and the light-emitting layer constitutes an inorganic phosphor layer having a composition gradient that Cu concentration in the host material varies by a factor of at least 10 in a thickness direction of the light-emitting layer.

Abstract: Inorganic phosphor particles are provided, each of which containing: a matrix including at least one compound selected from the group consisting of II Group-XVI Group compounds, XII Group-XVI Group compounds, and mixed crystals thereof; and at least one metal element selected from the group consisting of metal elements belonging to Groups 6 to 11 in second transition series and third transition series of the periodic table, the metal element forming a luminescent center including wherein at least 30% of all the inorganic phosphor particles are particles each having at least 10 stacking fault planes at intervals of at most 5 nm.

Abstract: A photoelectric conversion device includes a photoelectric conversion semiconductor layer for generating an electric current when it absorbs light, a first electrode formed in contact with a light-absorbing surface of the semiconductor layer, and a second electrode formed in contact with a rear surface of the semiconductor layer. The semiconductor layer is a single-particle film including a binder layer and separate photoelectric conversion semiconductor particles. At least parts of the photoelectric conversion semiconductor particles are embedded in the binder layer. The photoelectric conversion semiconductor particles have a mean particle diameter of not less than 1 ?m and not more than 60 ?m and a variation coefficient of particle diameter of less than 30%. Parts of the semiconductor particles are in contact with the second electrode at the rear surface and parts of the semiconductor particles are in contact with the first electrode at the front surface via a buffer layer.

Abstract: A method of producing an electroluminescence phosphor, which contains the steps of: mixing a phosphor matrix, a flux, an activator, and a particle diameter-controlling additive that does not enter into a crystal lattice of the phosphor matrix, to give a mixture; and baking the mixture, to produce the electroluminescence phosphor, the method containing the step of: adding an acidic or alkaline solution, to remove the particle diameter-controlling additive from the phosphor; an electroluminescence phosphor, which is produced by the method; and an electroluminescence device, which contains the electroluminescence phosphor.

Abstract: The present invention provides a method for producing metallic nanoparticles, which includes reacting a copper compound with a hydrazine reducing agent in an organic solvent in the presence of a precious metal compound, wherein the precious metal compound is a compound containing at least one precious metal selected from the group consisting of platinum, gold, silver, and palladium, and the total number of precious metal atoms in the precious metal compound is in the range of 1 to 10 at. % of the total copper atoms in the copper compound.

Abstract: A dispersion type EL element is provided which shows an excellent luminance and has an improved life. Further, a dispersion type EL element is provided which permits a large-sized panel, shows an excellent luminance and an excellent durability and has an improved life. A dispersion type electroluminescent element comprising a pair of electrodes one of which is a back electrode and the other of which is a transparent electrode and, disposed between the electrodes, at least an insulating layer and a luminescent-particle-containing luminescent layer, the luminescent particles having an average size of from 1 ?m to less than 20 ?m and a coefficient of variation of from 3% to less than 35%, and the element having a barrier layer containing at least one material selected from the group consisting of a thermoplastic resin, a thermoset resin and a Ultraviolet-cured resin between the transparent electrode and the luminescent layer.