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:
Apr. 15, 2014
Filed:
Mar. 06, 2009
Mingjie Zhou, Guangdong, CN;
Wenbo MA, Guangdong, CN;
Zhaopu Shi, Guangdong, CN;
Ocean's King Lighting Science & Technology Co., Ltd., Shenzhen, CN;
Abstract
The present invention relates to oxide luminescent materials activated by trivalent thulium and their preparations. The luminescent materials are the compounds with the following general formula: (RETm)O, wherein a range of x is 0<x≦0.05 and RE is one or two selected from Y, Gd, La, Lu and Sc. These materials are prepared by Sol-Gel method or high temperature solid phase method using metal oxide of Tm, chloride of Tm, nitrate of Tm, carbonate of Tmor oxalate of Tm, and one or two of oxide Y, Gd, La, Luor Sc, chloride Y, Gd, La, Luor Sc, nitrate Y, Gd, La, Luor Sc, carbonate Y, Gd, La, Luor Scand oxalate of Y, Gd, La, Luor Scas raw material. The present oxide luminescent materials activated by trivalent thulium have high stability, color purity and luminous efficiency, and the methods can easily be operated.