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Method for preparing porous spherical CaSi2O2N2:Eu2 plus fluorescent powder

A porous spherical and fluorescent powder technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of easy agglomeration, large size, and irregular shape of product particles, and achieve difficult agglomeration, simple production equipment, and maintain a porous spherical shape appearance effect

Inactive Publication Date: 2010-04-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the shape of the product particles is irregular, the size is large, and it is easy to agglomerate

Method used

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  • Method for preparing porous spherical CaSi2O2N2:Eu2 plus fluorescent powder
  • Method for preparing porous spherical CaSi2O2N2:Eu2 plus fluorescent powder
  • Method for preparing porous spherical CaSi2O2N2:Eu2 plus fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Dissolve calcium chloride, europium chloride, and polyethylene glycol in 200mL water to form solution A; dissolve sodium carbonate, polyethylene glycol, and sodium lauryl sulfate in 300mL water to form solution B, keep in solution A The concentration of calcium chloride is the same as that of sodium carbonate in solution B, which is 0.1M; the molar ratio of europium chloride to calcium chloride is 0.03:1; the concentration of polyethylene glycol in solutions A and B is the same, which is 1g / L; the concentration of sodium lauryl sulfate is 1 × 10 -2M; quickly pour the prepared A solution into solution B, stir for 1 min, keep at 20°C, pH 7 and let stand for 18h, wash the obtained precipitate with water for 5 times, and dry at 80°C for 2h to obtain (Eu, Ca )CO 3 hollow microspheres;

[0031] Take 1g (Eu, Ca)CO 3 The hollow microspheres are dispersed in 200mL water, and the molar ratio of CaCO at room temperature 3 : SiO 2 = 1:2 Add 0.05M Na dropwise 2 SiO 3 Solutio...

Embodiment 2

[0034] Dissolve calcium chloride, europium chloride and polyethylene glycol in 400mL water to form solution A; dissolve sodium carbonate, polyethylene glycol and sodium lauryl sulfate in 600mL water to form solution B; keep in solution A The concentration of calcium chloride is the same as that of sodium carbonate in solution B, both being 0.1M; the molar ratio of europium chloride to calcium chloride is 0.03:1; the concentration of polyethylene glycol in solutions A and B is the same, both being 1.5g / L; the concentration of sodium lauryl sulfate is 2×10 -2 M; quickly pour the prepared solution A into solution B, stir for 5 minutes, keep at 25°C, pH 8 and let it stand for 24 hours, wash the obtained precipitate with water for 5 times, and dry at 80°C for 2 hours to obtain (Eu, Ca )CO 3 hollow microspheres;

[0035] Take 1.2g (Eu, Ca)CO 3 The hollow microspheres are dispersed in 300mL water, and the molar ratio of CaCO at room temperature 3 : SiO 2 =1.2:2 Add 0.1M Na drop...

Embodiment 3

[0038] Dissolve calcium chloride, europium chloride, polyethylene glycol 6000 in 400mL water to form solution A; dissolve sodium carbonate, polyethylene glycol 6000, and sodium lauryl sulfate in 600mL water to form solution B; keep the solution The concentration of calcium chloride in A is the same as that of sodium carbonate in solution B, which is 0.2M; the molar ratio of europium chloride to calcium chloride is 0.05:1; the concentration of polyethylene glycol in solution A and B is the same, both are 1.5g / L; the concentration of sodium lauryl sulfate is 2×10 -2 M, quickly pour the prepared solution A into solution B, stir for 1 min, keep at 20°C, pH 8 and leave to age for 24h, wash the obtained precipitate with water 8 times, and dry at 100°C for 0.5h to obtain (Eu, Ca)CO 3 hollow microspheres;

[0039] Take 1.2g (Eu, Ca)CO 3 The hollow microspheres are dispersed in 300mL water, and the molar ratio of CaCO at room temperature 3 : SiO 2 =1.2:2 Add 0.1M Na dropwise 2 Si...

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Abstract

The invention relates to a method for preparing porous spherical CaSi2O2N2:Eu2 plus fluorescent powder, which comprises the following steps: (1) dissolving calcium chloride, europium chloride and polyethylene glycol into water to prepare solution A, dissolving sodium carbonate, polyethylene glycol 6,000 and sodium dodecyl sulfate into the water to prepare solution B, pouring the solution A into the solution B for stirring, standing, water-rinsing and drying, taking and dispersing (Eu, Ca)CO3 into the water, adding Na2SiO3 solution, adjusting a pH value of the solution to 7 to 8, and then stirring, water-rinsing and drying the mixed solution; and (2) under the air current of NH3, heating a product obtained by the treatment in the step (1) to 1,250 to 1,400 DEG C, preserving the temperature and then cooling the product to a room temperature to obtain the porous spherical CaSi2O2N2:Eu2 plus fluorescent powder. The method of the invention is characterized by simpleness, low cost, simple required production equipment, low nitriding temperature, short nitriding time, energy consumption reduction and easy realization of industrial production; and the obtained porous spherical CaSi2O2N2:Eu2 plus fluorescent powder is good in dispersity, is not easy to agglomerate and keeps porous spherical appearance.

Description

technical field [0001] The present invention belongs to CaSi 2 o 2 N 2 :Eu 2+ The field of phosphor preparation, especially related to a kind of porous spherical CaSi 2 o 2 N 2 :Eu 2+ Preparation method of fluorescent powder. Background technique [0002] Since the invention of InGaN-based blue light-excited white light-emitting diodes (White-LEDs), the application of white-light LEDs in electronic devices has developed rapidly, such as the backlight of mobile phones; at the same time, with the advancement of semiconductor chip technology and high-efficiency fluorescent With the development of powder, the luminous efficiency of white LED has been and will be more significantly improved. White LEDs have shown the potential to replace traditional lighting methods. At present, the luminous efficiency of white LEDs has surpassed incandescent lamps and is approaching fluorescent lamps. And because of the long life, energy-saving and environment-friendly characteristics o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
Inventor 王宏志谷鋆鑫李耀刚张青红
Owner DONGHUA UNIV
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