Diolame fluorescent powder and preparing method thereof

A fluorescent powder and coating technology, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of blackening of luminescent screens, short lifespan, and insufficient compactness of the protective film, so as to simplify the film forming process, prevent adverse effects, and prolong the life of the film. The effect of service life

Inactive Publication Date: 2004-07-07
殷忠梅 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in sol-gel, the coated oxide and oxo-salt colloidal particles are difficult to be evenly adsorbed on the surface of the phosphor, and even after sintering in air, the protective film formed on the surface of the phosphor is still not dense enough.
Since the quality of the phosphor coating directly affects the performance of the phosphor, the protective film formed by the sol-gel method still cannot completely prevent the surrounding environment from invading the phosphor, and the phosphor produced still has a certain The attenuation of luminous intensity is faster, the life is shorter, and the shortcomings of making the luminous screen black

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Dissolve 100g of zinc sulfide-type electroluminescent powder and 1.0g of boric acid in 75ml of water, stir slowly at a constant temperature of 50°C for 2 hours, filter and dry, then bake the phosphor powder in a furnace at 470°C for 0.25 hour, and then cooled in the air to obtain phosphor powder coated with boron oxide film. Then place the phosphor powder coated with boron oxide film in 75ml commercial nano-scale titanium oxide solution, wherein the titanium oxide content is 1% of the phosphor powder weight, stir slowly at a constant temperature of 50°C for 3 hours, filter and dry, repeat After the above process twice, the phosphor powder was baked in an oven at 530° C. for 3 hours, and then cooled in the air to obtain a phosphor powder coated with a titanium borate film. The brightness of this coating powder remains unchanged, and the half-life is increased from 500 hours to 3500 hours (see attached table).

Embodiment 2

[0027]Embodiment 2: 100g of zinc sulfide type electroluminescent powder and 1.0g of boric acid are placed in 75ml of commercial nano-scale titanium oxide solution, wherein the content of titanium oxide is 1% of the phosphor weight, and stirred slowly at a constant temperature of 50°C for 3 hours, After filtering and drying, the above process was repeated twice, and then the phosphor was baked in an oven at 530° C. for 3 hours, and then cooled in the air to obtain phosphor coated with a titanium borate film. The brightness of this coating powder remains unchanged, and the half-life is increased to 3000 hours (see attached table).

Embodiment 3

[0028] Embodiment 3: 100g zinc sulfide type electroluminescence powder and 1.0g boric acid are placed in 70 ℃ 100ml commercial nanoscale aluminum oxide (Al 2 o 3 ) solution, wherein the aluminum oxide content is 0.9% of the weight of the fluorescent powder, stirred slowly for 2.5 hours, filtered and dried, repeated the above process four times, and then baked the fluorescent powder in a furnace at 500°C for 3 hours, and then Cool in the air to obtain phosphor powder wrapped with aluminum borate film. The brightness of this coating powder remains unchanged, and the half-life is increased to 4000 hours (see attached table).

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PUM

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Abstract

A coated fluorescent powder features that the surface of its particle is coated by the compact and impervious film of borate or composite borate, so preventing the ambient humidity influence and elongating its service life. Its advantages are low cost and simple preparing process.

Description

technical field [0001] The invention relates to a fluorescent powder surface treatment technology, in particular to a coating fluorescent powder and a coating preparation method which can significantly improve the moisture resistance and decay resistance of the fluorescent powder, and increase the brightness, efficacy and service life of the fluorescent powder. Background technique [0002] Field-induced or photo-induced phosphors will undergo complex electrical or photochemical reactions due to moisture in the air, resulting in rapid attenuation of luminous intensity, reduced lifespan, and blackening of the luminescent screen. film (such as SiO 2 、TiO 2 or Al 2 o 3 Oxide coating) to effectively prevent the surrounding environment, especially humidity, from invading the phosphor powder, thereby prolonging the service life of the phosphor powder. [0003] Commonly used coating methods include chemical vapor deposition and sol-gel method. Because the chemical vapor deposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02
Inventor 殷忠梅吴雪飞姚准英
Owner 殷忠梅
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