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A kind of preparation method of near ultraviolet fluorescent powder strontium europium pyrophosphate

A technology of strontium europium pyrophosphate and phosphor powder, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem of uneven mixing, and achieve the effects of high radiation flux and excellent powder particle morphology.

Active Publication Date: 2017-01-04
CAIHONG GRP ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic commercial strontium and europium pyrophosphates generally use strontium hydrogen phosphate (SrHPO4), diammonium hydrogen phosphate [(NH4)2HPO4], europium carbonate (EuCO3) or europium oxide (Eu2O3) to dry mix and carry out redox or direct reduction synthesis, this method of mixing has the risk of inhomogeneous mixing

Method used

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  • A kind of preparation method of near ultraviolet fluorescent powder strontium europium pyrophosphate
  • A kind of preparation method of near ultraviolet fluorescent powder strontium europium pyrophosphate

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preparation example Construction

[0026] A preparation method of near-ultraviolet fluorescent powder strontium europium pyrophosphate, comprising the following steps:

[0027] Step 1, Oxidation of the Matrix Material

[0028] Weigh a certain mass of matrix material strontium hydrogen phosphate (SrHPO) 4 ) into an open alumina crucible, put into a muffle furnace, oxidize and burn at 680 ℃-900 ℃ for more than 3 hours, and cool to room temperature;

[0029] Step 2, Intermediate Processing

[0030] The matrix material strontium hydrogen phosphate (SrHPO 4 ) into a polyethylene plastic bottle, then press strontium hydrogen phosphate (SrHPO 4 ): ball: water is dispersed according to the mass ratio of 1:2:2, the dispersion speed is 20-50 rpm, the dispersion time is 3-6 hours, and then the dispersed strontium hydrogen phosphate (SrHPO 4 ) through a 300-600 mesh water sieve, and then pass the strontium hydrogen phosphate (SrHPO 4 ) powder was washed with water under the following conditions, strontium hydrogen pho...

Embodiment 1

[0041] Step 1, Oxidation of the Matrix Material

[0042] Weigh the matrix material strontium hydrogen phosphate (SrHPO 4 ) 500g, put into open alumina crucible, put into muffle furnace, temperature 680 ℃, oxidative burning for 4 hours, cooled to room temperature;

[0043] Step 2, Intermediate Processing

[0044] The matrix material strontium hydrogen phosphate (SrHPO 4 ) into a polyethylene plastic bottle, then press strontium hydrogen phosphate (SrHPO 4 ): ball: water is dispersed in a mass ratio of 1:2:2, the dispersion speed is 30 rpm, and the dispersion time is 6 hours, and then the dispersed strontium hydrogen phosphate (SrHPO 4 ) through a 300-mesh water sieve, and then the strontium hydrogen phosphate (SrHPO 4 ) powder was washed with water under the following conditions, strontium hydrogen phosphate (SrHPO 4 ) powder: the water is 1:10 by mass ratio, the water temperature is 80 ℃, washed with water for more than 3 times, the water content in the powder after the w...

Embodiment 2

[0053] Step 1, Oxidation of the Matrix Material

[0054] Weigh the matrix material strontium hydrogen phosphate (SrHPO 4 ) 700g, put into open alumina crucible, put into muffle furnace, temperature 800 ℃, oxidative burning for 4 hours, cooled to room temperature;

[0055] Step 2, Intermediate Processing

[0056] The matrix material strontium hydrogen phosphate (SrHPO 4 ) into a polyethylene plastic bottle, then press strontium hydrogen phosphate (SrHPO 4 ): ball: water is dispersed in a mass ratio of 1:2:2, the dispersion speed is 35 rpm, and the dispersion time is 5 hours, and then the dispersed strontium hydrogen phosphate (SrHPO 4 ) through a 300-mesh water sieve, and then the strontium hydrogen phosphate (SrHPO 4 ) powder was washed with water under the following conditions, strontium hydrogen phosphate (SrHPO 4 ) Powder: the water is 1:10 by mass ratio, the water temperature is 80 ° C, and the water is washed for more than 3 times, and the water content in the powder...

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Abstract

A near ultraviolet fluorescent powder pyrophosphate strontium europium preparation method is as follows: weighing certain quality of matrix material strontium hydrogen phosphate for burning and cooling, after dispersing, sieving with a mesh, washing with water and drying, mixing and stirring with europium oxide and oxalic acid, adding aqueous ammonia for neutralizing, filtering the precipitate, calcining and cooling obtained europium-wrapped oxidized strontium hydrogen phosphate powder and additive diammonium hydrogen phosphate, again sieving with a mesh, washing with water and drying, and finally sieving with a 100-mesh nylon mesh to obtain the fluorescent powder pyrophosphate strontium europium Sr2P2O7: Eu<2 +>; the fluorescent powder pyrophosphate strontium europium has the characteristics of mixing uniformity, high radiant flux, excellent powder particle morphology, uniform particle.

Description

technical field [0001] The invention relates to a method for manufacturing a fluorescent powder, in particular to a method for preparing a near-ultraviolet fluorescent powder strontium europium pyrophosphate. Background technique [0002] In 1967 the Dutch synthesized strontium europium pyrophosphate, mainly used in copiers. In recent years, people's research on strontium and europium pyrophosphate has become increasingly active. As a special light source, strontium and europium pyrophosphate is widely used in all walks of life, such as fluorescent lamps for treating children with yellow pox in hospitals, stage lights for stage effects, and landscape lights for creating beautiful landscapes. , Plant growth lights and aquarium lights to promote plant growth. Domestic commercial strontium and europium pyrophosphates generally use strontium hydrogen phosphate (SrHPO4), diammonium hydrogen phosphate [(NH4)2HPO4], europium carbonate (EuCO3) or europium oxide (Eu2O3) after dry mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71
Inventor 王晓云杨溦杨石燕
Owner CAIHONG GRP ELECTRONICS CO LTD
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