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Method for preparing yttrium gadolinium oxide and europium nano luminescent powder by micro-emulsion method

A technology of luminescent powder and microemulsion method, used in chemical instruments and methods, luminescent materials, etc., can solve the problems of uneven doping of activators, uneven grain size distribution of composite nano-powders, and difficulty in simultaneous precipitation. , to achieve the effect of simple raw materials, short preparation cycle and good dispersibility

Inactive Publication Date: 2008-09-10
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combustion method to prepare Y 2 o 3 Composite nanopowders have uneven grain size distribution
Co-precipitation method, due to the different conditions for the complete precipitation of various ions, it is difficult to precipitate at the same time, and it is easy to cause uneven doping of the activator

Method used

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  • Method for preparing yttrium gadolinium oxide and europium nano luminescent powder by micro-emulsion method
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  • Method for preparing yttrium gadolinium oxide and europium nano luminescent powder by micro-emulsion method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the preparation process, add 100ml of cyclohexane, 7.670g of CATB, and 20.0ml of n-butanol into a 400ml beaker, stir vigorously with a magnetic stirrer, and at the same time add 5.0ml of 0.2mol / L rare earth solution. After 2 minutes, the solution It becomes transparent and a stable microemulsion system (referred to as a) is obtained. Get the same amount of hexanaphthene, CATB and n-butanol in another 400ml beaker, add 1.0mol / L ammonia solution 15.0ml while stirring, and keep stirring to obtain a transparent microemulsion (referred to as b). Under the condition of constant stirring, add solution a into solution b, after a period of time, it will become turbid. After reacting for 30 minutes, use vacuum pump to filter, wash with absolute ethanol for several times and then put it in a vacuum drying oven for 24 hours at 80°C after suction filtration Finally, the precursor powder is obtained, which is then calcined at 800°C to obtain a sample after grinding and s...

Embodiment 2

[0025] Change the concentration of initial rare earth solution to be 0.40mol / L, other conditions are as embodiment 1, the appearance of gained powder is as follows Figure 2a shown in SEM, while its particle size is given by Figure 2b According to the TEM pictures in the middle, the powder dispersibility is better in the range of 10-20nm.

Embodiment 3

[0027] Change the concentration of initial rare earth solution to be 0.70mol / L, other conditions are as embodiment 1, the appearance of gained powder is as follows image 3 As shown, the morphology of the powder is basically elongated.

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Abstract

A method to prepare nanometer luminescent powders of yttrium oxide, gadolinium oxide and europium oxide through the microemulsion method relates to a preparation method for a chemical industrial raw material, wherein oxide of highly purified rare earth is adopted as the raw material, cyclohexane is adopted as the oil phase and cetyltrimethylammonium bromide is adopted as the surfactant, and butanol is an adjuvant surfactant, all of which is used to produce a nanometer luminescent powder (Y, Gd) 2O3: Eu with excellent dispersibility, and the figure in approximate sphere and the size between 10-20nm through the reversed micromulsion method. The performance of the powder is the best when the concentration of the original solution is 0.4mol / l, as proved by comparison between the influences on the figure of the powder by different original concentrations. The highest luminescent capability is observed when the content of Eu is 10at percent. The method for preparation of the luminescent powder with the formula of (Y, Gd) 2O3:Eu is characterized in simplified method, good controllability on the figure of the powder, and wide prospect in the preparation field of the nanometer material.

Description

technical field [0001] The invention relates to a method for preparing chemical raw materials, in particular to a method for preparing yttrium oxide, gadolinium, and europium (Y, Gd) by using an inverse microemulsion method. 2 o 3 : The method of Eu(YGO) nano-luminescent powder. Background technique [0002] Y 2 o 3 :Eu and Gd 2 o 3 : Eu is a luminescent material that has been studied more, and is widely used in the field of photoluminescent materials due to its excellent red luminescent properties. However, with the development of nanotechnology, the unique properties of nanomaterials have gradually emerged, such as high activity, high specific surface energy, etc. Studies have shown that as the particle size of luminescent powder decreases, its luminescent performance will be greatly improved. Great enhancement. Also in Y 2 o 3 : Adding Gd to Eu can enhance the material's ability to stop X-rays and improve luminous efficiency. Use (Y, Gd) 2 o 3 The ceramic scint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 马伟民沈世妃闻雷郭易芬刘晶尹凯王华栋
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY