Red fluoresent material, and preparing technique

A red phosphor powder and phosphor technology, applied in the preparation of the red phosphor powder, in the field of red phosphor powder, can solve the problems of difficult to achieve satisfactory particle size, influence of ball milling luminous efficiency, wide product particle size distribution, etc., and achieve easy operation control, Conducive to the expansion of large-scale production, the effect of high luminous efficiency
CN101050362AInactive Publication Date: 2007-10-10NANJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF TECH
Publication Date
2007-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to a spray-pyrolysis process for preparing red fluorescent powder, whose chemical formula is (Li1-aNaa) (Eu1-b-c-dSmbYcGdd)(SiO2)1 / 6(W1-mMom)2O8, wherein, a is 0-0.8; b is 0-0.08; c is 0-0.08; d is 0-0.08; m is 0-1. The spray-pyrolysis process comprises: weighing soluble compounds of the cations according to the above chemical formula, preparing clear precursor solution, atomizing, reacting, and collecting the red fluorescent powder. The red fluorescent powder is approximately spherical, and has such advantages as high crystallinity, uniform particle size distribution, smooth particle surface, high luminescent efficiency, and high color purity. The spray-pyrolysis process has such advantages as simple process, easy operation, and high production efficiency, and is suitable for continuous production.
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Description

technical field

[0001] The invention belongs to the field of luminescent materials and relates to a red fluorescent powder excited by purple light. The invention also relates to a preparation method of the red fluorescent powder. Background technique

[0002] White light LED has the advantages of small size, low calorific value, low power consumption, long life, fast response, environmental protection, planar packaging, and easy development into thin, light and small products. The fourth-generation lighting source, which may replace traditional lighting in the future, has a very broad application prospect. At present, the form of white LED realization is mainly to use LED to excite the matching luminescent material to form white light, that is, use blue LED with yellow phosphor, or use blue LED with green phosphor and red phosphor, or use purple LED with red, Green and blue phosphors. The red phosphor used plays an important role in modulating the color temperature of whi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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