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Method for preparing high-luminous-intensity water-resistant phosphor powder

A technology of luminous intensity and water resistance, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous intensity and poor water resistance, and achieve the effect of improving luminous intensity, good transmission performance and good stability

Inactive Publication Date: 2018-05-18
蒋春霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for preparing a high-luminous-intensity water-resistant phosphor in view of the defects of low luminous intensity and poor water resistance in common phosphors at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Mix water glass and silicon dioxide at a mass ratio of 3:1 and stir for 8 minutes to obtain a mixture. Mix the mixture, deionized water and sesame oil in a flask at a mass ratio of 5:3:1 and stir for 10 minutes. After stirring, The flask was placed in an ultrasonic disperser for ultrasonic dispersion for 20 minutes, and after dispersion, it was heated and refluxed at a temperature of 85°C for 1 hour to obtain a reaction solution, which was washed with absolute ethanol for 3 times, air-dried naturally, ground and discharged to obtain a self-made mixture; Add 80mL of hydrofluoric acid solution with a mass fraction of 42% and 60mL of deionized water into a polyethylene beaker, mix and stir for 10min, then place in an ice-water bath at 0°C to cool for 20min, then continue to add 45g of carbonic acid to the polyethylene beaker after cooling Magnesium, mixed and stirred for 1h, filtered to remove the filtrate, put the filter residue in a kiln, and dried at a temperature of 300...

example 2

[0026]Mix water glass and silicon dioxide at a mass ratio of 3:1 and stir for 9 minutes to obtain a mixture. Mix the mixture, deionized water and sesame oil at a mass ratio of 5:3:1 and place them in a flask and stir for 11 minutes. After stirring, The flask was placed in an ultrasonic dispersing machine for ultrasonic dispersion for 25 minutes. After dispersion, it was heated and refluxed at a temperature of 87°C for 2 hours to obtain a reaction solution. The reaction solution was washed with absolute ethanol for 4 times, air-dried naturally, and ground and discharged to obtain a self-made mixture; Add 90mL of hydrofluoric acid solution with a mass fraction of 42% and 70mL of deionized water to a polyethylene beaker, mix and stir for 11min, and then cool in an ice-water bath at 0°C for 25min, then continue to add 50g of carbonic acid to the polyethylene beaker after cooling. Magnesium, mixed and stirred for 1.5h, filtered to remove the filtrate, put the filter residue in a kil...

example 3

[0028] Mix water glass and silicon dioxide at a mass ratio of 3:1 and stir for 10 minutes to obtain a mixture. Mix the mixture, deionized water and sesame oil at a mass ratio of 5:3:1 and place them in a flask and stir for 12 minutes. After stirring, The flask was placed in an ultrasonic disperser for ultrasonic dispersion for 30 minutes, and then heated and refluxed at a temperature of 90° C. for 3 hours to obtain a reaction solution. The reaction solution was washed with absolute ethanol for 5 times, air-dried naturally, and ground and discharged to obtain a self-made mixture; Add 100mL of hydrofluoric acid solution with a mass fraction of 42% and 80mL of deionized water to a polyethylene beaker, mix and stir for 12min, then place in an ice-water bath at 0°C to cool for 30min, then continue to add 55g of carbonic acid to the polyethylene beaker after cooling Magnesium, mixed and stirred for 2 hours, filtered to remove the filtrate, put the filter residue in a kiln, and dried ...

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Abstract

The invention discloses a method for preparing high-luminous-intensity water-resistant phosphor powder, and belongs to the technical field of preparation of phosphor powder. A hydration reaction is performed on sodium silicate and silica so as to obtain silicon hydroxide, and furthermore silica has X-ray amorphism, so that the luminous intensity of the phosphor powder is increased; magnesium fluoride is obtained by mixing magnesium carbonate with hydrofluoric acid for a reaction, and since magnesium fluoride has good transmission of visible light and vacuum ultraviolet light, good stability ismaintained during preparation of magnesium fluoride so that the luminous intensity of the phosphor powder can be furthermore improved. According to the method, ammonium metavanadate and ethylenediamine tetraacetic acid disodium salt are utilized to conduct joint modification on a yttrium nitrate solution and an europium nitrate solution, and polyvinylpyrrolidone and sodium lauryl sulfate are added continuously, wherein polyvinylpyrrolidone belongs to water-soluble polymer organic matter, so that the defect center on the surface can be reduced; furthermore, the density of the phosphor powder can be improved through matrix particles, and the luminous intensity of the phosphor powder can be further improved; a broad application prospect is provided.

Description

technical field [0001] The invention discloses a method for preparing a water-resistant fluorescent powder with high luminous intensity, and belongs to the technical field of fluorescent powder preparation. Background technique [0002] Phosphor powder, commonly known as luminous powder, is usually divided into two types: photo-induced energy storage luminous powder and radioactive luminous powder. Photo-energy storage luminous powder is a fluorescent powder that stores light energy after being irradiated by natural light, daylight, ultraviolet light, etc., and then slowly releases it in the form of fluorescence after stopping the light irradiation, so it can be used at night or in dark places. , can still see the luminescence, which lasts for several hours to more than ten hours. [0003] There are three main types of fluorescent powder for lamps. The first type is used for ordinary fluorescent lamps and low-pressure mercury lamps, the second type is used for high-pressur...

Claims

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Application Information

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IPC IPC(8): C09K11/78C09K11/02
CPCC09K11/7792C09K11/025
Inventor 孙建忠杨亚生陈可
Owner 蒋春霞
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