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
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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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