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Preparation method of low-temperature cured nitride red phosphor paste

A red phosphor and nitride technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as narrow application range, and achieve the effects of simple equipment, convenient use and easy operation

Inactive Publication Date: 2011-01-12
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the phosphor paste on the market needs to be cured at high temperature to meet the requirements of use, and the application range is narrow, mainly used in the field of display devices

Method used

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  • Preparation method of low-temperature cured nitride red phosphor paste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, the metal M nitride, europium nitride and silicon nitride are mixed according to the atomic number ratio M:Eu:Si=(2-x):x:5 (M=Ca, Sr, Ba), where x = 0.5. After mixing evenly, calcinate at 1400-1600°C for 15 hours under a nitrogen atmosphere; ball mill after calcining, and obtain nitride red phosphor powder M after ball milling 1.5 Eu 0.5 Si 5 N 8 (M=Ca, Sr, Ba) powder particle size 1~25μm;

[0020] Then, under constant temperature conditions of 70° C., 5 grams of vinyl acetate resin was dissolved in 40 grams of ethylene glycol ether and 5 grams of terpineol until completely dissolved, and filtered to obtain an organic vehicle;

[0021] Finally, add 30 grams of nitride red fluorescent powder prepared in step 1), 0.1 gram of polyethylene wax dispersant, and 1.5 gram of γ-aminopropyltriethoxysilane thickener to 20 grams of the above-mentioned organic carrier, and mix well , After filtering through 200 meshes, the low-temperature curing nitride red phosphor slur...

Embodiment 2

[0024]Step 1): Mix metal M nitride, europium nitride and silicon nitride according to the atomic number ratio M:Eu:Si=(2-x):x:5, where x=0.2; after mixing evenly, Calcined at 1400-1600°C for 8 hours in a nitrogen atmosphere; ball milled after calcination, and obtained nitride red phosphor powder M after ball milling 1.8 Eu 0.2 Si 5 N 8 (M=Ca, Sr, Ba) particle size 1~25μm;

[0025] Step 2): under the constant temperature condition of 80°C, 15 grams of vinyl acetate resin was dissolved in 35 grams of ethylene glycol ether according to the mass percentage, until it was completely dissolved, and the organic carrier was obtained by filtration;

[0026] Step 3): Add 30 grams of nitride red fluorescent powder prepared in step 1), 0.5 grams of zinc stearate dispersant, and 0.5 grams of vinyl tris (β-methoxyethoxy) silane thickener to 25 grams of the above-mentioned In the organic carrier, mix evenly, and filter through 200 mesh to obtain low-temperature curing nitride red phosphor...

Embodiment 3

[0028] Step 1): Mix metal M nitride, europium nitride and silicon nitride according to the atomic number ratio M:Eu:Si=(2-x):x:5, where x=1; after mixing evenly, Calcined at 1400-1600°C for 20 hours under a nitrogen atmosphere; ball milled after calcination, and obtained nitride red phosphor powder M after ball milling 1 Eu 1 Si 5 N 8 (M=Ca, Sr, Ba) particle size 1~25μm;

[0029] Step 2): under the constant temperature condition of 90°C, 10 grams of vinyl acetate resin was dissolved in 30 grams of ethylene glycol ether and 10 grams of terpineol according to the mass percentage until it was completely dissolved, and the organic carrier was obtained by filtration;

[0030] Step 3): Add 40 grams of nitride red fluorescent powder prepared in step 1), 1.0 grams of microcrystalline paraffin dispersant, and 1.5 grams of di(dioctylpyrophosphoryl) oxyacetate titanium thickener to 16 grams of the above-mentioned In the organic carrier, mix evenly, and filter through 200 mesh to obta...

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Abstract

The invention provides a preparation method of low-temperature cured nitride red phosphor paste, comprising the following steps: 1) mixing the nitrides, europium nitride and silicon nitride of metal M according to the atom number ratio of M:Eu:Si being (2-x):x:5, after uniform mixing, calcining the mixture in nitrogen atmosphere and ball-milling the calcined mixture to obtain phosphor, wherein x is more than 0 and not more than 1.0; 2) dissolving vinyl chloride-vinyl acetate resins or polyester resins in solvents, then heating the mixture at constant temperature until the mixture is completely dissolved and filtering the dissolved substances to obtain an organic carrier; and 3) adding the phosphor prepared in the step 1), thickening agents and dispersing agents to the organic carrier prepared in the step 2) and stirring the mixture uniformly, thus preparing the low-temperature cured nitride red phosphor paste. The preparation method has the advantages of simple and easily operated adopted equipment and capability of realizing preparation of paste of the low-temperature cured nitride red phosphor M(2-x)EuxSi5N8 (M=Ca, Sr or Ba).

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a method for preparing a low-temperature curing nitride red phosphor slurry. Background technique [0002] Nitride red phosphors can be used in display, lighting and other fields, and have very good application prospects. Nitride phosphors are also widely considered to be important fluorescent materials in the future. m (2-x) Eu x Si 5 N 8 (M=Ca, Sr, Ba) nitride red phosphor has good chemical stability and thermal stability, and can be excited by blue light and ultraviolet light to emit light. It has high luminous efficiency, good safety performance, and has many advantages such as non-toxic and environmental protection. m (2-x) Eu x Si 5 N 8 (M=Ca, Sr, Ba) nitride red phosphors are mainly synthesized by low-cost solid-phase reaction technology. At present, the phosphor pastes on the market need to be cured at high temperature to meet the requirements of use, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
Inventor 余可
Owner IRICO
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