Y2O3:Eu<3+> red powder having high specific surface area and preparation method thereof
A high specific surface, red powder technology, applied in the field of phosphor powder, can solve the problems of uneven coating, large specific surface area, large proportion of red powder in three primary colors, etc., and achieve the effect of reducing powder consumption and high specific surface area.
Active Publication Date: 2015-11-11
HAIMEN DADE INTPROP SERVICE CO LTD
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Problems solved by technology
[0003] Aiming at the deficiencies of the prior art, the present invention provides a high specific surface Y 2 o 3 : Eu 3+ Red powder and its preparation method, using porogens to prepare high specific surface Y with porous structure 2 o 3 : Eu 3+ Red powder, while improving the brightness, forms a fluffy powder with a porous structure and a large specific surface area, which solves the problem of uneven coating caused by the large specificity of the traditional rare earth three-color red powder
Method used
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Embodiment 1
[0025] After mixing 50g of yttrium-europium co-precipitation with a mass fraction of 6.6% europium, 1g of KF and 0.5g of carbon powder, they were calcined at 1300°C for 4 hours, cooled and ground evenly.
Embodiment 2
[0027] Mix 50g of yttrium-europium coprecipitate with a mass fraction of 6.6% europium, 0.5g of KF, 0.5g of LiF and 0.5g of starch, after mixing evenly, calcining at 1275°C for 8h, cooling and grinding until uniform.
Embodiment 3
[0029] Mix 100g of yttrium-europium co-precipitate with a mass fraction of 6.6% europium, 1g of NaF, 0.5g of benzoic acid and 0.5g of starch, after mixing uniformly, calcinate at 1350°C for 6h, cool and grind evenly.
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Abstract
The invention relates to Y2O3: Eu<3+> red powder having high specific surface area and a preparation method thereof. The preparation method comprises the steps: co-precipitating yttrium and europium, mixing a fluxing agent and a hole-forming substance, and forming rare-earth three-base-color red powder having a porous structure in a synthesis method by means of a high-temperature solid-phase method. The method is simple, the synthesized three-base-color red powder has a porous structure, the specific surface area is relatively large, not only can the brightness of the red powder be improved, but also the loose porous structure solves the problem of the traditional red powder that a large specific gravity causes non-uniformity in coating a three-base-color lamp tube, and consumption of powder for coating can be reduced.
Description
technical field [0001] The invention relates to the technical field of fluorescent powder, in particular to a high specific surface Y 2 o 3 : Eu 3+ Red powder and its preparation method. Background technique [0002] Compared with ordinary incandescent lamps, rare earth tricolor energy-saving lamps can save up to 80% of electricity, and can obtain a color temperature similar to that of sunlight, so that the color of the illuminated object is pure and undistorted, and its production process does not pollute the environment. It is recognized as an ideal lamp today. Green lighting project, rare earth three-based toner occupies an important position in the field of green lighting. However, because the specific gravity of the rare earth three-color red powder is larger than that of the blue and green powders, it causes problems such as uneven coating during the coating process, which seriously affects the stability of the quality of the finished lamp. Contents of the inventi...
Claims
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IPC IPC(8): C09K11/78
Inventor 林静涛黎广才
Owner HAIMEN DADE INTPROP SERVICE CO LTD