Blue luminophore for plasma fluorescent screen and its preparation method

A plasma and phosphor technology, applied in chemical instruments and methods, luminescent materials, solid cathode parts, etc., can solve problems that have not been solved stably, phosphors have poor chemical stability, are unstable and easy to hydrolyze, etc.

Inactive Publication Date: 2004-02-25
孙德春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Because the chromaticity coordinates X=0.12, Y=0.09-0.11, can not meet the requirements, and deviate from the color circle value required by the RGB three-color coordinates of the plasma fluorescent screen;
[0005] 2. Since the maximum emission peak of the phosphor is within the range of λmax=415nm-430nm, the luminous brightness is insufficient
[0007] The phosphor has low water resistance and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Example 1, take the following reagent grade compounds respectively

[0031] Ba(OH) 2.8 h 2 O 0.89 mole

[0032] Eu 2 o 3 0.055 mole

[0033] Mg(OH) 2 1.00 mole

[0034] Al(OH) 3 h 2 O 9.60 mole

[0035] Sc(OH) 3 0.20 mole

[0036] Ga(OH) 3 0.20 mole

[0037] First, after heating the mixture of the above compounds to 100°C, the crystal water was evaporated and removed by a spray dryer with a rotation speed of 6000 rpm, and then ground by a star mill with a rotation speed of 2000 rpm.

[0038] Then, put the ground mixture into a crucible, and burn it in an atmosphere of nitrogen containing 5% hydrogen at a temperature of 1470° C. for 3 hours to obtain a chemical composition of Ba 0.89 Eu 0.11 MgAl 9.6 sc 0.2 Ga 0.2 o 17 of phosphors.

[0039] Finally, put the fired phosphor into a 1% concentration of metasilicate (H 2 SiO 3 ), and slowly add 0.2% magnesium acetate [Mg(CH 3 COO) 2 ] solution. T...

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PUM

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Abstract

The present invention belongs to an innovation of flat panel display technology, and relates to a preparation method of blue fluorescence body for plasma screen. On the basis of conventional BaMgAl10O17:Eu+2 the scandium ion and gallium ion (Sc+3+Ga+3) are doped, and its chemical composition formula is Ba1-xEuxMgAl10-y-zScyGa2 O17, where X=0.01-0.2, Y=0.005-0.3 and Z=0.001-0.25. Under the discharge wavelength lambda-147 nm vacuum UV light excitation the light-emitting luminance of said invented fluorescence body is raised by 10-12%, and can be up to 400 candela/sq.m.

Description

technical field [0001] The invention belongs to the technology of blue fluorescent body for flat panel display, and specifically refers to a preparation method of the fluorescent body for plasma fluorescent screen. Background technique [0002] As is well known, plasma phosphor screens driven by direct current and alternating current have been widely used. This plasma phosphor screen is used to reproduce a large amount of full-color information. These information can usually be clearly observed within a distance of 2 to 20 meters. In the plasma fluorescent screen, it is filled with inert mixed gas such as xenon (Xe) and neon (Ne). This inert gas generates discharge under the excitation of high-frequency electric field, and emits vacuum ultraviolet light with a value of λmax=147nm-171nm. Under the excitation of the vacuum ultraviolet light, the red, blue and green phosphor layers coated on the inner surface of the plasma fluorescent screen with a thickness of about 0.2-0.6 ...

Claims

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Application Information

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IPC IPC(8): C09K11/80H01J17/04H01J17/49
Inventor 高殿昆孙德春褚明辉
Owner 孙德春
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