Red-light fluorescent powder and method for making same

A technology of red fluorescent powder and fluorescent powder, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of high price and low cost, and achieve the effects of low cost, low production temperature and high luminous efficiency

Inactive Publication Date: 2008-04-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at existing yttrium vanadate (YVO 4 :Eu 3+ ) The problem that the price of the red light phosphor exists

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the molar ratio of 94:6:167, weigh 3.33g of calcium nitrate (Ca(NO 3 ) 2 4H 2 (2), 0.30g europium nitrate and 5.25g citric acid are dissolved in deionized water to obtain a mixed solution; then 1.17g ammonium metavanadate is added in the above mixed solution, and magnetically stirred at a constant temperature of 80° C. for 30 minutes to obtain viscous Blue gel; finally, heat-treat the above gel at 750°C for 1 hour, and then grind to obtain the red fluorescent powder Ca 3 (VO 4 ) 2 :Eu 3+ .

Embodiment 2

[0015] According to the ratio of molar ratio 94:6:200, weigh 3.33g calcium nitrate (Ca(NO 3 ) 2 4H 2 (2), 0.30g europium nitrate, 6.30g citric acid are dissolved in deionized water to obtain a mixed solution; then 1.17g ammonium metavanadate is added in the above mixed solution, and magnetically stirred at a constant temperature of 80° C. for 30 minutes to obtain viscous Blue gel; finally, the above gel is heat-treated at 750°C for 1 hour, and the low-cost red phosphor Ca can be obtained after grinding 3 (VO 4 ) 2 :Eu 3+ .

Embodiment 3

[0017] According to the ratio of molar ratio 94:6:233, weigh 3.33g calcium nitrate (Ca(NO 3 ) 2 4H 2 (2), 0.30g europium nitrate, 7.35g citric acid are dissolved in deionized water to obtain a mixed solution; then 1.17g ammonium metavanadate is added in the above-mentioned mixed solution, and magnetically stirred at a constant temperature of 80° C. for 30 minutes to obtain viscous Blue gel; finally, the above gel is heat-treated at 800°C for 1 hour, and the red fluorescent powder Ca can be obtained after grinding 3 (VO 4 ) 2 :Eu 3+ .

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PUM

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Abstract

The invention provides a red-emitting phosphor. The chemical structural formula of the phosphor material is Ca3(VO4)2:Eu3+. A preparation method of the phosphor is that calcium nitrite, europium nitrate, and citric acid with the mole ratio of 94:6:167-233 are dissolved in deionized water and mixture solution is obtained. Then ammonium metavanadate with proper quantity is added into the mixture and is heated and stirred for a certain time to get viscogel. In the end the hot viscogel is grinded and the product is made. The invention uses a citric acid sol-gel combustion method to prepare the nano Ca3(VO4)2:Eu3+ phosphor. The phosphor is uniform comparatively and has good chemical stability and luminescence with high efficiency. The cost is low. The preparation technology is simple and safe with low production temperature and can save energy.

Description

technical field [0001] The invention relates to a red fluorescent powder and a preparation method thereof, belonging to the technical field of luminescent materials. technical background [0002] Europium-activated yttrium vanadate (YVO 4 :Eu 3+ ) Phosphor powder is a very good red-emitting phosphor, which is widely used in high-pressure mercury lamps, PDPs, etc. With the increase of application fields, the demand for phosphors increases sharply, and the cost of phosphors based on various rare earth materials is relatively high, so it is necessary to find a relatively cheap material to replace them. [0003] In addition, the current preparation methods of phosphors are mainly concentrated in the high-temperature solid-phase method, but the solid-phase method has high synthesis temperature, large product particle size and wide particle size distribution, it is difficult to achieve the required particle size, and it is not easy to obtain pure phase substances. big downside....

Claims

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Application Information

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IPC IPC(8): C09K11/82
Inventor 吕孟凯张海萍张爱玉周媛媛邱子凤马谦
Owner SHANDONG UNIV
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