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Method for preparing phosphor suspension for water coating phosphor

The technology of phosphor and suspension is applied in the field of preparation of phosphor suspension for water coating powder, which can solve the problems of inability to use, long time and high temperature of baking tube, avoid viscosity drop, save production cost and save high temperature The effect of the baking process

Active Publication Date: 2014-02-12
ANHUI SHILIN LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most domestic manufacturers use sodium carboxymethyl cellulose (CMC) as the main raw material, which is acidified with hydrochloric acid and ammonized with ammonia water to make carboxymethyl cellulose ammonium. The water-coated powder using this type of binder is economical and affordable. Currently, T8 Lamp manufacturers use this kind of water-coated powder more often, but the water-coated powder with this kind of binder requires high temperature and long time for baking tubes, and its powder loss is not better than that of butyl ester powder, and there are some special uses. Fluorescent powder (such as mosquito powder) cannot use this kind of water powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add deionized water to a low-speed mixer and stir at 180 rpm, slowly pour in the alumina powder while stirring, configure the alumina powder and deionized water in a weight ratio of 10:90, and wait until the alumina powder is completely immersed in the water Add 25ml of dispersant, and continue to stir for 2 hours to form a 10% alumina solution for use; take the hydrophilizing agent stock solution and absolute ethanol and stir evenly at a weight ratio of 5:95 to prepare a 5% concentration Aqueous solution; add deionized water to the high-speed mixer and stir at 600 rpm, and then slowly add polyethylene oxide powder weighed with the deionized water in a weight ratio of 5:95 to the high-speed mixer and stir. Make a polyethylene oxide glue solution with a concentration of 5%. After stirring for 1 hour, decelerate to 100 rpm and stir for 4 hours. Stop stirring and store in the dark for later use; take the prepared concentration to 10 The% alumina solution is poured into a hi...

Embodiment 2

[0022] Add deionized water to a low-speed mixer and stir at 200 rpm, and slowly pour the alumina powder while stirring. The alumina powder and deionized water are configured in a weight ratio of 11:89, and the alumina powder is completely immersed in the water At the time, add 28ml of dispersant and continue to stir for 3 hours to form an alumina solution with a concentration of 11% for use; take the stock solution of hydrophilic agent and anhydrous ethanol and stir evenly at a weight ratio of 5:95 to prepare a 5% affinity solution. Aqueous solution; add deionized water to the high-speed mixer and stir at 650 rpm, and then slowly add polyethylene oxide powder weighed with deionized water in a weight ratio of 5:95 to the high-speed mixer and stir to prepare Make a polyethylene oxide glue solution with a concentration of 5%. After stirring for 1 hour, decelerate to 150 rpm and stir for 4 hours. Stop stirring and store in the dark for later use; take the prepared concentration to b...

Embodiment 3

[0024] Add deionized water to a low-speed mixer and stir at 220 rpm, slowly pour the alumina powder while stirring, the alumina powder and deionized water are configured in a weight ratio of 12:88, and the alumina powder is completely immersed in the water When adding 30ml of dispersant, continue to stir for 4 hours to form an alumina solution with a concentration of 12% for use; take the stock solution of the hydrophilic agent and anhydrous ethanol and stir evenly at a weight ratio of 5:95 to prepare a concentration of 5% Aqueous solution; add deionized water to the high-speed mixer and stir at 700 rpm, and then slowly add polyethylene oxide powder weighed with deionized water in a weight ratio of 5:95 to the high-speed mixer and stir to prepare Make a polyethylene oxide glue solution with a concentration of 5%. After stirring for 1 hour, decelerate to 200 rpm and stir for 4 hours. Stop stirring and store in the dark for later use; take the prepared concentration to 12 % Alumi...

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PUM

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Abstract

The invention relates to a method for preparing a phosphor suspension for water coating phosphor, comprising the following steps: first preparing an alumina solution in a low-speed mixer for stand-by; next preparing a hydrophilic agent solution with a hydrophilic agent stock solution and absolute ethyl alcohol for stand-by; then preparing a polyethylene oxide glue solution in a high-speed mixer for stand-by; adding the stand-by alumina solution into the high-speed mixer containing the polyethylene oxide glue solution for stirring, adding phosphor, ammonium nitrate, a dispersant and the hydrophilic agent solution when stirring, then stirring in a high speed and adjusting the slurry viscosity and specific gravity to technology range; then filtering the stirred phosphor suspension with a filter sieve and stirring the phosphor suspension in the low-speed mixer for stand-by until to be used. The phosphor suspension manufactured by adopting the preparation method of the invention is not only capable of omitting the high-temperature tube baking process in the water coating phosphor technology, greatly reducing production cost, but also greatly improves the photoelectric parameters and the lux maintenance for the tube.

Description

Technical field [0001] The invention relates to the technical field of fluorescent powder for water-coated powder in the production of fluorescent lamps, in particular to a method for preparing a fluorescent powder suspension for water-coated powder. Background technique [0002] The water-coating process in the production of fluorescent lamps refers to the process in which water is used as a solvent and a water-soluble glue is used as a binder to prepare a suspension of phosphors and apply them to the inner wall of the glass tube. After the phosphor suspension is applied, The adhesive contained in the phosphor suspension must be baked at a high temperature of about 500° C. This will have an adverse effect on the light output and luminous flux maintenance rate of the lamp itself. The key to the water-coating process lies in the selection of adhesives and the preparation of phosphors. The suspension after mixing the adhesive and phosphors and other solvents directly affects the pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/22
Inventor 桑永树吴百超涂如辉刘军
Owner ANHUI SHILIN LIGHTING
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