Spherical terbium doped tungstate green phosphor and preparation thereof

A technology of green fluorescent powder and tungstate, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of irregular particle shape, uneven size distribution, and degradation of phosphor performance, so as to facilitate lighting and lighting. Color rendering, easy to promote and use, and not easy to be damaged by radiation
CN101486904AInactive Publication Date: 2009-07-22LONGNAN JINGLI NONFERROUS METAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LONGNAN JINGLI NONFERROUS METAL CO LTD
Publication Date
2009-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to spherical terbium doped tungstate green phosphor powder and a preparation method thereof; the phosphor powder is spherical crystal; the particle size distribution is 1 to 5 mum, and the center particle diameter D50 is 3 to 4 mu m; and the chemical molecular formula is R1-2x(Tb, Na)2xWO4, wherein, R is one of Ca, Sr and Ba, and x equals to 0.01 to 0.2. The Tb3+ doped alkaline earth tungstate green phosphor power obtained by adopting the invention is nanometer crystal; the particles have regular shape, even size distribution, good phosphor powder optical property and stable physical and chemical properties; under the excitation of the ultraviolet ray, X-ray and energetic particles, the Tb3+ doped alkaline earth tungstate green phosphor power can achieve visible light emission when the wavelength is 545nm, and realize high energy conversion; besides, the emission wavelength is conducive to lighting and color and positioned on the sensitive response wave band of CCD simultaneously; and the spherical terbium doped tungstate green phosphor powder and the preparation method thereof have wide application prospects in the fields such as lighting, plasma flat-panel display, etc.
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Description

Technical field

[0001] The invention relates to a spherical terbium-doped tungstate green fluorescent powder and a preparation method thereof. Background technique

[0002] In the application of various display materials, especially the three primary color phosphors used in lamps, green phosphors are the key. It plays a major role in the luminous efficacy and lumen maintenance of the lamp. At present, the green phosphors produced and researched at home and abroad are mainly divided into three major systems: phosphate-based phosphors, borate-based phosphors and aluminate-based phosphors. Among them, phosphate green phosphor has the advantages of high light efficiency, low synthesis temperature, and moderate particle size, but poor thermal stability; borate green phosphor has the advantages of high efficiency, low sintering temperature, and easy synthesis, but the sintering temperature range is very narrow. , easy to agglomerate; aluminate green phosphor has the advantages o...

Claims

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