BLUE FLUORESCENT POWDER AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Title:

BLUE FLUORESCENT POWDER AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2021/012394

Kind Code:

A1

Abstract:

Disclosed are a blue fluorescent powder and a preparation method therefor and an application thereof, belonging to the technical field of fluorescent powder used for light emitting diode (LED) in illumination and display field. Eu2+ is used as an activator, and a sol-gel method is adopted to prepare SrAl2SiO 6:nEu2+(n=0.006-0.008) blue fluorescent powder. The described preparation method can uniformly mix the raw materials into a power with high activity, thus greatly reduces the later sintering temperature and saves energy. With easy reaction and a formed sample having high purity to match ultraviolet and/or near ultraviolet LED chip, the method has a simple preparation technology and an easily operable production process.

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Inventors:

WANG YI (CN)
WEI FEILONG (CN)
WANG MENGXIA (CN)

Application Number:

PCT/CN2019/109529

Publication Date:

January 28, 2021

Filing Date:

September 30, 2019

Export Citation:

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Assignee:

UNIV WUYI (CN)

International Classes:

C09K11/08; C09K11/64; H01L33/50

Foreign References:

US20100284166A1	2010-11-11
KR20140036090A	2014-03-25

Other References:

JIANRONG QUI , M KAWASAKI , K TANAKA , Y SHIMIZUGAWA , K HIRAO: "Phenomenon and mechanism of long-lasting phosphorescence in Eu<2+>-doped aluminosilicate glasses", JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, vol. 59, no. 9, 1 September 1998 (1998-09-01), pages 1521 - 1525, XP002514843, ISSN: 0022-3697, DOI: 10.1016/S0022-3697(98)00070-5
LUITEL HOM NATH: "Preparation and Properties of Long Persistent Sr4Al14O25 Phosphors Activated by Rare Earth Metal Ions", THESIS, 1 March 2010 (2010-03-01), pages 1 - 145, XP055775106

Attorney, Agent or Firm:

JIAQUAN IP LAW FIRM (CN)

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