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Fluorescent powder dispersion method

A fluorescent powder, dispersion technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of unfavorable phosphor powder manufacturing cycle and brightness, long, 18 to 40 hours, lengthening phosphor powder manufacturing cycle, etc., to achieve dispersion time The effect of shortening, small decrease in brightness, and increase in brightness

Inactive Publication Date: 2008-05-07
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, with the existing dispersion method, the dispersion time of phosphor powder is very long at present, which is 18-40 hours, and the brightness of phosphor powder is low at the same time.
[0003] Overall, there are disadvantages in the existing technology: for large-scale manufacturing of phosphors, one is that the phosphor powder manufacturing cycle is lengthened, and the other is that the brightness of the phosphor powder is low, which is not conducive to the phosphor powder manufacturing cycle and brightness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: First, the phosphor, water and dispersed balls are mixed in a mass ratio of 1:1.2:0.8. The dispersed balls are cylindrical nylon balls with a diameter of 2 to 3 mm and a height of 2 to 3 mm, and then mix them in the mixture Add 1.786ml of potassium silicate solution with a mass concentration of 28% per kilogram of phosphor; then use a disperser with a speed of 400 to 600 revolutions / min to disperse for 2 to 7 hours. After the dispersion is completed, remove the dispersion ball and use the reducer The pressure conveying method separates the phosphor powder slurry; finally, the separated phosphor powder slurry is dehydrated, which is the dispersed green luminescent phosphor.

Embodiment 2

[0009] Example 2: First, the phosphor, water and dispersed balls are mixed in a mass ratio of 1:1.2:0.8. The dispersed balls are cylindrical nylon balls with a diameter of 2 to 3 mm and a height of 2 to 3 mm, and then mix them in the mixture Add 3ml of potassium silicate solution with a mass concentration of 24% per kilogram of phosphor; then use a disperser with a speed of 400 to 600 revolutions per minute to disperse for 2 to 7 hours. After the dispersion is completed, remove the dispersion ball and apply a reduced pressure The conveying method separates the phosphor powder slurry; finally, the separated phosphor powder slurry is dehydrated, which is the dispersed green luminescent phosphor.

Embodiment 3

[0010] Example 3: First, the phosphor, water and dispersed balls are mixed in a mass ratio of 1:1.2:0.8. The dispersed balls are cylindrical nylon balls with a diameter of 2 to 3 mm and a height of 2 to 3 mm, and then mix them in the mixture Add 5ml of potassium silicate solution with a mass concentration of 22% per kilogram of phosphor; then use a disperser with a speed of 400 to 600 revolutions / min to disperse for 2 to 7 hours. After the dispersion is completed, remove the dispersion ball and use a reduced pressure The conveying method separates the phosphor powder slurry; finally, the separated phosphor powder slurry is dehydrated, which is the dispersed green luminescent phosphor.

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Abstract

The invention relates to a method for dispersing phosphor, which adopts the process that: first, the phosphor, water and dispersant are mixed and then dispersed by a dispersion machine; after being dispersed, a dispersing ball is fished out and then the phosphor serum is separated by decompressing dispatch; at last, the separated phosphor serum is dehydrated in order obtain dispersed green emitting phosphor. The invention has the advantages of simple technology, short cycle for manufacturing phosphor, low manufacturing cost of phosphor, small decreasing extent of phosphor brightness and high phosphor brightness. The invention adopts a columniform nylon ball with smaller specific gravity than the phosphor and small impact to the phosphor; therefore, the ball can open the phosphor for agglomerating without damaging the surface of single phosphor crystal, thus, the decreasing extent of dispersed phosphor brightness is very small and the brightness of the product coated with phosphor is high.

Description

Technical field: [0001] The invention relates to a phosphor dispersion method, in particular to a phosphor dispersion method for polar ray tubes. Background technique [0002] Cathode ray tube uses green light-emitting phosphor. The dispersion method in the production process is to install phosphor, pure water, dispersant and dispersed glass balls in a drum ball mill according to the process ratio requirements, and then according to the required speed and time of the process Disperse. Because the drum type ball mill used in the current dispersion method is lined with porcelain material, and the dispersion ball is made of glass material, its specific gravity is larger than that of phosphors, and its impact on phosphors is great. Its shape is spherical, which can be dispersed for a long time. In the process, the surface of the single crystal of the phosphor was damaged while opening the phosphor powder to condense. For the dispersion of the phosphor, it is actually to open the cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/00
Inventor 蔡步军李伟苟宝峰
Owner CAIHONG GRP ELECTRONICS CO LTD
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