OXYNITRIDE FLUORESCENT SUBSTANCE POWDER, SILICON NITRIDE POWDER FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING SAME

Title:

OXYNITRIDE FLUORESCENT SUBSTANCE POWDER, SILICON NITRIDE POWDER FOR MANUFACTURING SAME, AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2013/054901

Kind Code:

A1

Abstract:

The present invention relates to oxynitride fluorescent substance powder which contains aluminum nitride and alpha-type SiAlON expressed in the following composition formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (where, x1 is larger than 0 and equal to or smaller than 3.40, x2 is between 0.05 and 0.20, y is between 4.0 and 7.0, and z is between 0 and 1). A light reflectance of a peak wavelength of a fluorescence of the oxynitride fluorescent substance powder of the present invention, which is emitted by being excited by a light with a wavelength of 450nm, is at least 80%. Silicon nitride powder for manufacturing the oxynitride fluorescent substance powder is crystalline silicon nitride powder with an oxygen content of between 0.2 wt% and 0.9 wt%. A method for manufacturing the oxynitride fluorescent substance powder of the present invention comprises a first process in which a burned oxynitride product expressed in the formula is obtained through source material mixing and burning within a temperature range of between 1,500°C and 2,000°C in an inert gas atmosphere, and a second process in which a thermal treatment is performed on the burned oxynitride product within a temperature range of between 1,100°C and 1,600°C in the inert gas atmosphere.

Inventors:

FUJINAGA MASATAKA (JP)
UEDA TAKAYUKI (JP)
SAKAI TAKUMA (JP)
JIDA SHINSUKE (JP)

Application Number:

PCT/JP2012/076485

Publication Date:

April 18, 2013

Filing Date:

October 12, 2012

Export Citation:

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Assignee:

UBE INDUSTRIES (JP)

International Classes:

C09K11/64; C01B21/068; C01B21/082; C09K11/08; C09K11/65

Domestic Patent References:

WO2005123876A1	2005-12-29
WO2012023414A1	2012-02-23
WO2006080535A1	2006-08-03
WO2009048150A1	2009-04-16

Foreign References:

JP2009096883A	2009-05-07
JP2005154611A	2005-06-16
JPH0940406A	1997-02-10
JP2002097005A	2002-04-02
JP2003112977A	2003-04-18
JP2010031201A	2010-02-12
JP2002363554A	2002-12-18
JP2009096882A	2009-05-07
JP2009096883A	2009-05-07
JP2005008794A	2005-01-13

Other References: