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A kind of rare earth phosphate green fluorescent powder and preparation method thereof

A technology of green phosphor and rare earth phosphate, applied in the field of fluorescent materials, can solve the problems of low brightness of green phosphor, difficulty in meeting production and living needs, and short fluorescent life.

Active Publication Date: 2019-04-02
河南索顿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the brightness of green phosphors currently commercially available in my country is not high, and the fluorescence lifetime is too short, so it is difficult to meet the needs of production and life in practical applications.

Method used

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  • A kind of rare earth phosphate green fluorescent powder and preparation method thereof
  • A kind of rare earth phosphate green fluorescent powder and preparation method thereof
  • A kind of rare earth phosphate green fluorescent powder and preparation method thereof

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preparation example Construction

[0026] According to one aspect of the present invention, a kind of preparation method of rare earth phosphate green fluorescent powder is provided, and this method comprises the following steps:

[0027] Step 1. adding rare earth lanthanum salt, terbium salt, cerium salt and phosphate into the acidic solution;

[0028] Step 2. adding boric acid;

[0029] Step 3. Carry out aftertreatment to obtain rare earth phosphate green fluorescent powder.

[0030] In a preferred embodiment, the lanthanum (La) salt includes lanthanum nitrate, lanthanum sulfate, lanthanum chloride and lanthanum acetate, and the terbium (Tb) salt includes terbium nitrate, terbium sulfate, terbium chloride and terbium acetate , the cerium (Ce) salt includes cerium nitrate, cerium sulfate, cerium chloride and cerium acetate.

[0031] In a further preferred embodiment, the lanthanum salt is lanthanum nitrate, the terbium salt is terbium nitrate, and the cerium salt is cerium acetate.

[0032] In a preferred e...

Embodiment 1

[0103] in la 0.6 PO 4 Tb x Ce (0.4-x) Weigh the corresponding amount of La(NO 3 ) 3 ·6H 2 O, Tb(NO 3 ) 3 ·6H 2 O, Ce(CH 3 COO) 3 ·6H 2 O, (NH 4 ) 2 HPO 4 Soluble in concentrated HNO 3 , then sonicate until dissolved, add 5% boric acid, and then adjust the pH to 5 while stirring at 80°C, the resulting white precipitate is washed, filtered and dried in an oven at 80°C to obtain a loose white powder , and then calcined in a muffle furnace at 800°C for 2h under an activated carbon reducing atmosphere to obtain a rare earth phosphate green phosphor.

Embodiment 2

[0105] in la 0.6 PO 4 Tb x Ce (0.4-x) Weigh the corresponding amount of La(NO 3 ) 3 ·6H 2 O, Tb(NO 3 ) 3 ·6H 2 O, Ce(CH 3 COO) 3 ·6H 2 O, (NH 4 ) 2 HPO 4 Soluble in concentrated HNO 3 , then sonicate until dissolved, add 5% boric acid, and then adjust the pH to 5 while stirring at 80°C, the resulting white precipitate is washed, filtered and dried in an oven at 80°C to obtain a loose white powder , and then calcined in a muffle furnace at 800°C for 2 hours under an activated carbon reducing atmosphere to obtain a rare earth phosphate green phosphor, and the color of the product is basically white.

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Abstract

The invention discloses green rare-earth and phosphate phosphor and a preparation method thereof. The method comprises the following steps: firstly, rear-earth lanthanum salts, terbium salts, cerium salts and phosphate are added to an acid solution; secondly, borid acid is added; thirdly, aftertreatment is performed, and the green rare-earth and phosphate phosphor is obtained, wherein the adding amount of the boric acid is 2%-8%; aftertreatment comprises washing, suction filtering, drying and / or calcination in a reducing atmosphere at a temperature of 700-1000 DEG C for 0.1-4 h. The invention also discloses the green rare-earth and phosphate phosphor prepared based on the method. The chemical formula of the phosphate is La(0.6)PO4Ce(0.4-x), and x is larger than or equal to 0.15 and smaller than or equal to 0.25. The preparation method provided by the invention is simple to operate, easy to implement, and applicable to large-scale commercial production. Meanwhile, the green rare-earth and phosphate phosphor provided by the invention has high brightness.

Description

technical field [0001] The invention belongs to the field of fluorescent materials, in particular to a green fluorescent material, in particular to a rare earth phosphate green fluorescent powder and its preparation. Background technique [0002] Rare earth phosphate phosphors have attracted much attention because of their chemical stability, high luminous efficiency, and high color rendering. They have adjustable color and color temperature, excellent lumen maintenance, high luminous efficiency, and high color rendering, and are used in metallurgy, petrochemical, optics, lighting, lighting, etc. The phosphors of rare earth phosphate system have the advantages of relatively low synthesis temperature, high luminous efficiency, moderate particle size, and strong color rendering. Therefore, the research on rare earth phosphate luminescent materials is a hot research topic in current material science. Among them, among the three primary color phosphors, the rare earth phosphate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
CPCC09K11/778
Inventor 陶栋梁张坤金凤崔玉民李慧全
Owner 河南索顿新材料有限公司