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Preparation of blue powder for color display tube

A color display and practical technology, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of inability to manufacture products, and achieve the effects of improved display effect, improved coating performance, and pure color

Inactive Publication Date: 2009-03-04
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the manufacture of traditional blue phosphor powder for color picture tube CRT, the powder particle size is basically required to be above 6.5 μm, while the powder particle size of blue phosphor powder for color display tube CDT is required to be around 5.0 μm, using traditional flux Products of this specification cannot be manufactured

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add 0.8% zinc chloride, 1.2% potassium chloride and 1.8% sulfur to zinc sulfide, and mix them to prepare raw meal;

[0027] 2) Put the raw material into a quartz crucible and burn it at a burning temperature of 880°C and a holding time of 1.5 hours to form a powder;

[0028] 3) After removing the oxidation layer and the abnormal light-emitting part on the upper part of the powder block, continuously add deionized water, pass through a 200-mesh nylon sieve in a slurry state, and after sieving, lead into the washing tank;

[0029] 4) Add deionized water to make the slurry and deionized water reach a weight ratio of 1:6, stir for 0.2 hours; let the slurry settle completely, drain the upper clear liquid, and retain the lower slurry; repeat the above steps, , Until the conductivity of the supernatant reaches 700μS / cm;

[0030] 5) After dewatering the slurry, obtain the powder block, put the powder block into the ball mill for ball milling; add glass balls and deionized water ...

Embodiment 2

[0042] 1) Add 1.2% by weight of zinc chloride, 0.8% of potassium chloride and 2% of sulfur to zinc sulfide, and mix them evenly to prepare raw meal;

[0043] 2) Put the raw material into a quartz crucible and burn it at a burning temperature of 880°C and a holding time of 1 hour to form a powder;

[0044] 3) After removing the oxide layer and the abnormal light-emitting part on the upper part of the powder block, continuously add deionized water, pass a 100-mesh nylon sieve in a slurry state, and then introduce it into the washing tank;

[0045] 4) Add deionized water to make the slurry and deionized water reach a weight ratio of 1:6, and the stirring time is 1 hour; let stand until the slurry settles completely, drain the upper clear liquid, and retain the lower slurry; repeat the above Step, until the conductivity of the supernatant reaches 100μS / cm;

[0046] 5) Drain the supernatant liquid, get the powder after dehydration, put the powder in the ball mill and ball mill; add gla...

Embodiment 3

[0058] 1) Add 1% zinc chloride, 1% potassium chloride and 1.9% sulfur to zinc sulfide, and mix them evenly to prepare raw meal;

[0059] 2) Put the raw material into a quartz crucible and burn it at a burning temperature of 880°C and a holding time of 1.2 hours to form a powder;

[0060] 3) After removing the oxidation layer and the abnormal light-emitting part on the upper part of the powder block, continuously add deionized water, pass through a 150-mesh nylon sieve in a slurry state, and after sieving, lead into a washing tank;

[0061] 4) Add deionized water to make the slurry and deionized water reach a weight ratio of 1:6, stir, and the stirring time is 0.5 hours; let the slurry settle completely, drain the upper clear liquid, and retain the lower slurry ; Repeat the above steps until the conductivity of the supernatant is 400μS / cm;

[0062] 5) After dehydrating the slurry, obtain the powder block, put the powder block into the ball mill for ball milling; add glass balls and...

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PUM

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Abstract

The invention discloses a preparation method of blue powder used for a color display tube; zinc butter, potassium chloride and sulfur are added into zinc sulphide, mixed and then deteriorated; after the upper oxidized part is removed, the mixture is washed by water until the conductive rate of a supernatant fluid is between 10 and 50Mu S / cm; a powder block is taken out after dewatering; after ball milling is carried out on the powder block, the powder slurry is discharged and the water is removed; then the powder block is taken out; then powder slurrying is carried out again; paints and latex are added, after being fully stirred, the acidity of the powder slurry is adjusted by sulphuric acid; then the powder slurry is wasted by water and dehydrated, dried, filtered and then powder slurrying is carried out again; isinglass, colla corii asini, silicon dioxide and zinc sulfate are added; the acidity is adjusted by sodium hydroxide; then the powder slurry is wasted by water; alumina is added; then the powder slurry is extracted, filtered and dried, thus being capable of obtaining a cathode radial luminescent material which is coated on a display screen for improving the display effect and improving the coating performance; the cathode radial luminescent material can be used for the manufacture of the color display tube and a display tube.

Description

Technical field [0001] The invention relates to a preparation method of a luminescent material required for a color display, in particular to a preparation method of a cathode ray luminescent material. Background technique [0002] Zinc sulfide silver chloride has been used as a blue luminescent material for color picture tubes for more than 30 years; its high luminous efficiency, good chemical stability, proper afterglow and good color purity are highly regarded by people. [0003] In order to improve the color purity, contrast and color rendering of the color display tube CDT, in the process of preparing the color display tube CDT phosphors, the particle size requirement is smaller than that of the color picture tube CRT. At the same time, in order to ensure that the coating process The combination of three-color powder also has strict requirements on the particle size of each color powder in the preparation process of the phosphor. For a long time, the particle size adjustment...

Claims

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Application Information

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IPC IPC(8): C09K11/61
Inventor 杨欣苟宝峰范双宏刘君秀
Owner CAIHONG GRP ELECTRONICS CO LTD
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