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Method for preparing blue luminescent powder of aluminate activated by vacuum ultraviolet radiation

A ray-activated, vacuum ultraviolet technology, applied in the field of preparation of aluminate blue phosphors, can solve the problems of not being able to meet the needs of actual production, phosphor carbon pollution, waste of raw materials, etc., and it is easy to control the production conditions , the preparation process is simple, the effect of reducing production costs

Inactive Publication Date: 2003-05-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed gas of nitrogen and hydrogen requires strict burning conditions, long burning time, long whole preparation cycle, high preparation cost, and it is easy to cause explosion due to the existence of hydrogen in the preparation process.
Chinese patent CN1190115A discloses BaMgAl 14 o 23 : The preparation method of Eu, this patent is to directly cover the carbon powder on the raw material, because the carbon powder of this preparation method is directly in contact with the raw material, causing the carbon pollution of the part of the phosphor powder, thus causing the waste of the raw material in the preparation process
Therefore, this preparation method cannot well meet the needs of actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh BaCO 3 0.09 mol, Al 2 o 3 0.5 mole, MgO 0.1 mole, Eu 2 o 3 0.005 mol, H 3 BO 3 0.005 moles, fully grind and mix with a ball mill, put it into a smaller alumina crucible, cover it with a non-sealed lid, then put it into a larger alumina crucible, put its ink or carbon into the outer crucible Between the outer crucible and the inner crucible, cover the outer crucible with a sealed cover, put it into a high-temperature furnace, burn it for 5 hours at 1450 ° C, take it out after cooling, remove carbon, disperse it by ball milling, sieve it, wash it, then dry it, and sieve it to get High-efficiency blue phosphor with a luminance of 104 under excitation at 147nm.

Embodiment 2

[0019] Weigh BaCO 3 0.09 mol, Al 2 o 3 0.5 mole, MgO 0.1 mole, Eu 2 o 3 0.005 mol, NH 4 F 0.015 moles, other conditions are the same as in Example 1, and the brightness of the obtained phosphor is 103 under 147nm excitation.

Embodiment 3

[0021] Weigh BaC 2 o 4 2H 2 O 0.08 mol, Al(OH) 3 1 mole, Mg(OH) 2 0.1 mole, Eu 2 o 3 0.01 mol, H 3 BO 3 0.002 mol, AlF 3 0.004 mole, other conditions are the same as in Example 1, and the brightness of the obtained phosphor is 102 when excited at 147 nm.

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PUM

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Abstract

A vacuum ultraviolet ray activated blue fluorescent aluminate powder has a formula. Ba1-xEuxMgAl10O17, where x=0.02-0.2, and is prepared by choosing raw materials and coflux, generating reduction atmosphere, and controlling reaction temp and time. It can be used for plasma flat display or gas lamp.

Description

technical field [0001] The invention relates to a preparation method of aluminate blue phosphor excited by vacuum ultraviolet rays. Background technique [0002] In recent years, light-emitting devices under the excitation of vacuum ultraviolet rays have been widely developed. The mechanism is that the vacuum ultraviolet rays generated by the discharge of rare gases Xe, Ne-Xe, Ar, etc. excite phosphors to emit visible light. Under the excitation of vacuum ultraviolet rays, the light-emitting devices include color large-screen high-definition plasma flat panel display (PDP), mercury-free fluorescent lamps, etc., and PDP uses vacuum ultraviolet rays to excite different phosphors to produce three different colors of light: red, green and blue. In order to display color images, PDP has the advantages of small size, thin thickness, vivid images, and easy to be made into large-area flat-panel displays, and PDP can digitize display images through 8-byte digital grayscale control, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 尤洪鹏洪广言吴雪艳吴琼
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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