Ube Industries, Inc.

Ube Material Industries, Ltd.

Ube Materials Industries, Ltd.

Jin Amagai

Toru Inagaki

Kouichi Fukuda

Masaki Tanaka

Seiji Noguchi

Rika Nogita

Kaoru Takazaki

Koichi Fukuda

Takuya Shindo

Midori Sato

Tatsunori Sakaguchi

Kenji Arima

The present invention is a fluorescent material characterized by being represented by a composition of the following formula (1) and having a crystal lattice distortion obtained from a Williamson-Hall plot by X-ray diffraction within the range of 0.0005 to 0.0020.(Sr,Ca,M)MgSiO:Eu&#x2003;&#x2003;formula (1)wherein M is at least one rare earth metal elements selected from the group consisting of Sc, Y, Gd, Tb and La, and 0.01&#x2264;x&#x2264;0.10. Also, the present invention is a light-emitting device including the fluorescent material, and a light source that emits light by irradiating the fluorescent material with excitation light. Furthermore, the present invention is a method for producing the fluorescent material, including the steps of: obtaining an aqueous slurry of a raw material; and spray-drying the aqueous slurry with hot air at 80 to 300&#xb0; C.

Fluorescent material, light-emitting device, and method for producing fluorescent material

There is provided a fluorescent material having a composition represented by the following Formula (1). (Sr,Ba,Eu,M,M)SiO&#xb7;cMgO . . . Formula (1) (In the formula, Mis at least one tertiary group element selected from Y and Tb; Mis an alkali metal selected from Li, Na, and K; and 0&#x3c;a&#x3c;2, 0&#x3c;b&#x3c;2, 0&#x2266;c&#x3c;1, 0.001&#x2266;d&#x2266;0.06, 0&#x2266;e&#x2266;0.06, 0&#x3c;x&#x3c;0.1, and 3.7&#x2266;f&#x2266;4.1 are set.) Further, there is provided a light-emitting device including: the fluorescent material; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.

Fluorescent material and light-emitting device

The deep red light-emitting magnesium fluorogermanate phosphor prepared by calcining a mixture comprising a fine magnesium oxide powder having a BET specific surface area in the range of 5-200 m/g, a fluorine compound, a germanium compound and a manganese compound gives a light emission having a maximum peak of increased strength in the wavelength region of 640-680 nm upon excitation with a light having a wavelength of 400 nm.

Deep-red light-emitting magnesium fluoro-germanate fluoroescent body and method for producing same

A solid light-emitting device comprising a light-emitting semiconductor element and a phosphor dispersed in a sealant, in which the phosphor is exited by the light emitted by the semiconductor element to emit a visible light of a wavelength differing from that of the light emitted by the semiconductor element and is a silicate phosphor or a phosphor having a hydroxyl group on its surface, and the sealant is a condensation product of a prepolymer produced by condensation of polydimethyl-siloxane having a silanol group at both ends and an oligomer of an alkoxide of a metal or a semimetal or its derivative.

Light-emitting device and organic-inorganic hybrid pre-polymer composition comprising phosphor

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 green light-emitting silicate phosphor comprising Eu-activated strontium barium silicate which has a crystal phase of magnesium oxide or a merwinite crystal phase and contains 0.15 to 0.90 mol of magnesium per one mol of silicon gives a light emission stable at elevated temperatures.

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Ube, Japan

Jin Amagai