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Title:
Β-SIALON PHOSPHOR POWDER AND PROCESS FOR PRODUCTION OF THE SAME
Document Type and Number:
WIPO Patent Application WO/2009/048150
Kind Code:
A1
Abstract:
The invention provides a β-sialon phosphor exhibiting higher luminance which is usable in vacuum fluorescent displays (VFD), field emission displays (FED), plasma display panels (PDP), cathode ray tubes (CRT), light emitting diodes (LED), and so on. A novel high-luminance β-sialon phosphor powder having an average aspect ratio of less than 1.5 can be obtained by mixing α-silicon nitride particles having particle diameters of 2μm or above and an average aspect ratio of 1.3 or below with an AlN-containing aluminum source substance and either an oxide of metal Ln or a precursor capable of being converted into the oxide through pyrolysis in such a way as to give a composition represented by the general formula: Si6-zAlzOzN8-z:Lnx (wherein 0

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Inventors:
SAKAI TAKUMA (JP)
SAKATA SHIN-ICHI (JP)
Application Number:
PCT/JP2008/068512
Publication Date:
April 16, 2009
Filing Date:
October 06, 2008
Export Citation:
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Assignee:
UBE INDUSTRIES (JP)
SAKAI TAKUMA (JP)
SAKATA SHIN-ICHI (JP)
International Classes:
C09K11/64; C09K11/08; H01J1/63; H01L33/50
Domestic Patent References:
WO2006101095A12006-09-28
Foreign References:
JP2007224083A2007-09-06
JPH0940406A1997-02-10
JP2006052337A2006-02-23
JP2006321921A2006-11-30
JP2007264007A2007-10-11
JPS60206889A1985-10-18
JP2005255895A2005-09-22
Other References:
POWDER SCIENCE AND ENGINEERING, vol. 21, no. 8, 1989
See also references of EP 2213711A1
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg.5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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