Ube Material Industries, Ltd.

Seiji Noguchi

Toru Inagaki

Kouichi Fukuda

Akira Ueki

Jin Amagai

Yuzo Kato

Masayuki Fujimoto

Masaki Tanaka

Masato Yamauchi

A fine magnesium oxide particle dispersion liquid containing an aprotic solvent, and fine magnesium oxide particles that are dispersed in the aprotic solvent, wherein the dispersion liquid has Dof 200 nm or less in a particle size distribution as measured by a dynamic light scattering method, and has a content rate of coarse particles having an average particle diameter of 500 nm or more of less than 1%, and a method for producing the fine magnesium oxide particle dispersion liquid.

Fine magnesium oxide particle dispersion liquid and method for producing same

A magnesium oxide material includes a magnesium oxide powder treated with a halogen compound and a silane coupling agent. A method of producing a magnesium oxide material includes a step including preparing a magnesium oxide powder, a halogen compound treatment step including subjecting the magnesium oxide powder to a surface treatment with a halogen compound, and a silane coupling agent treatment step including subjecting the magnesium oxide powder to a surface treatment with a silane coupling agent.

Magnesium oxide material,thermally conductive filler and thermally conductive resin composition containing the same, and method of producing magnesium oxide material

A silicate phosphor having a coating layer comprising a fluorine-containing compound on its surface which is obtained by a method of heating a mixture of 100 weight parts of a silicate phosphor and 0.5-15 weight parts of ammonium fluoride at a temperature in the range of 200 to 600&#xb0; C. exhibits high light emission intensity and high moisture resistance.

Silicate phosphor exhibiting high light emission characteristics and moisture resistance, and light emitting device

The emission strength of a light released from a blue light-emitting phosphor having a merwinite crystal structure and an elemental formula of (Sr,Ca)MgSiOactivated with Eu in which a molar ratio of Sr and Ca is in the range of 1:0.10 to 1:0.30 is stable in a wide temperature range.

Blue light-emitting phosphor and light-emitting device using the blue light-emitting phosphor

A blue light-emitting silicate phosphor favorably employable as a blue light-emitting source of a light-emitting apparatus which gives emission of a visible light upon irradiation of ultraviolet rays having a wavelength of 254 nm, such as ultraviolet rays emitted by a fluorescent lamp is produced by a method comprising calcining a powdery mixture comprising a magnesium oxide powder, an MeO source powder, a EuO source powder and a SiOsource powder, said magnesium oxide powder having a purity of 99.9 wt. % or higher and a BET specific surface area in the range of 3 to 60 m/g and having been prepared by bringing a metallic magnesium vapor into contact with oxygen whereby oxidizing the metallic magnesium vapor.

Silicate-based blue light-emitting phosphor and method for producing same

A blue light-emitting phosphor having an elemental formula of SrMgSiO:Eu(wherein x represents a value in the range of 0.008 to 0.110), a merwinite crystal structure and a crystal lattice strain of 0.080% or less as determined from an X-ray diffraction pattern at diffraction angle 2&#x3b8; of 20-130&#xb0; by the Le Bail method, wherein the X-ray diffraction pattern is determined using a CuK&#x3b1; ray having an incident angle of &#x3b8;, is used advantageously as a blue light-emitting material for a light-emitting device which comprises a semiconductor light-emitting element capable of emitting a light having a wavelength of 350-430 nm upon application of an electrical current, such as a white light-emitting LED lamp, and a blue light-emitting material capable of emitting a blue light upon excitation with a light emitted by the semiconductor light-emitting element.

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Ube, Japan

Seiji Noguchi