Title:
Li-CONTAINING α-SIALON FLUORESCENT PARTICLES, METHOD FOR PRODUCING SAME, ILLUMINATION DEVICE, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/108740
Kind Code:
A1
Abstract:
Disclosed is a method for producing Li-containing α-sialon fluorescent particles, which involves: mixing an aluminum source containing AlN, a Li source, an Eu source, and silicon nitride or a silicon nitride-containing compound power; obtaining a Lithium-containing α-sialon power, which functions as a starting material, by firing the aforementioned mixture at 1500 to 1800°C in an inactive gas atmosphere, which contains nitrogen and which has a normal pressure; adding and mixing an additional lithium source to said powder; and re-firing said mixture at a temperature lower than the aforementioned firing temperature or at 1100°C or higher and lower than 1600°C in an inactive gas atmosphere, which contains nitrogen and which has a normal pressure. As a consequence, the light absorptivity and the fluorescence intensity of the Li (Lithium)-containing α-sialon fluorescent substance emitting short wavelength fluorescence is improved. Also provided are an illumination device and an image display device which uses said fluorescent substance.
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Inventors:
SAKATA, Shin-ichi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7558633, JP)
坂田 信一 (〒33 山口県宇部市大字小串１９７８番地の９６宇部興産株式会社内 Yamaguchi, 〒7558633, JP)
ODA, Hiroshi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7558633, JP)
坂田 信一 (〒33 山口県宇部市大字小串１９７８番地の９６宇部興産株式会社内 Yamaguchi, 〒7558633, JP)
ODA, Hiroshi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7558633, JP)
Application Number:
JP2011/055176
Publication Date:
September 09, 2011
Filing Date:
March 01, 2011
Export Citation:
Assignee:
UBE INDUSTRIES, LTD. (1978-96, Oaza Kogushi Ube-sh, Yamaguchi 33, 〒7558633, JP)
宇部興産株式会社 (〒33 山口県宇部市大字小串１９７８番地の９６ Yamaguchi, 〒7558633, JP)
SAKATA, Shin-ichi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7558633, JP)
坂田 信一 (〒33 山口県宇部市大字小串１９７８番地の９６宇部興産株式会社内 Yamaguchi, 〒7558633, JP)
宇部興産株式会社 (〒33 山口県宇部市大字小串１９７８番地の９６ Yamaguchi, 〒7558633, JP)
SAKATA, Shin-ichi (1978-96, Oaza Kogushi, Ube-sh, Yamaguchi 33, 〒7558633, JP)
坂田 信一 (〒33 山口県宇部市大字小串１９７８番地の９６宇部興産株式会社内 Yamaguchi, 〒7558633, JP)
International Classes:
C09K11/64; H01J11/02; H01J29/20; H01L33/50
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chome, Minato-k, Tokyo 23, 〒1058423, JP)
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