The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2013
Filed:
Feb. 01, 2007
Applicant:
Shin-ichi Sakata, Yamaguchi, JP;
Inventor:
Shin-ichi Sakata, Yamaguchi, JP;
Assignee:
Ube Industries, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/70 (2006.01); C09K 11/08 (2006.01); C09K 11/59 (2006.01); H01J 61/42 (2006.01); H01J 61/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method ensuring that a CaMgSiO:Eublue light-emitting phosphor having high emission intensity can be produced in an industrially advantageous manner is provided. The production method includes a step of mixing a calcium source powder, a europium source powder, a magnesium source powder and a silicon source powder composed of silicon diimide powder or the like in a ratio producing a CaMgSiO:Eublue light-emitting phosphor, and a step of subjecting the powder mixture to heating at a temperature of 400 to 1,000° C. in an oxygen-containing gas atmosphere and then firing at a temperature of 800 to 1,500° C. in a reducing gas atmosphere.