LIGHT-EMITTING MATERIAL AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2015/079507

A1

The present invention provides: a light-emitting material having improved water resistance, heat resistance and handling properties and also having high luminance; and a method for producing the light-emitting material. The light-emitting material according to the present invention comprises phosphor particles each containing strontium and each having a particle diameter of 15 to 50 μm and a silicon compound film that coats the surface of each of the phosphor particles. The light-emitting material according to the present invention can be produced suitably by a method comprising the steps of: sieving strontium-containing phosphor particles to adjust the particle diameters of the phosphor particles to values falling within the range from 15 to 50 μm; introducing the phosphor particles into water to prepare an aqueous dispersion and heating the aqueous dispersion to 50 to 90ºC; adding an alkaline silicate and an inorganic acid or a silane compound to the aqueous dispersion while keeping the aqueous dispersion in a state having a neutral pH value and then agitating the resultant aqueous dispersion; and drying the aqueous dispersion to produce a light-emitting material in which a silicon compound film is coated on the surface of each of the phosphor particles.

SAWADA TOSHIHIKO (JP)

PCT/JP2013/081830

June 04, 2015

November 27, 2013

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LUMINESSUS INC (JP)

C09K11/08; C09K11/55; C09K11/64

JP2011504544A	2011-02-10
JP2008050548A	2008-03-06
JP2003089767A	2003-03-28

AKATSUKA MASAKI (JP)
Masaki Akatsuka (JP)

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