Aluminate luminescent material and preparation method thereof

A luminescent material, aluminate technology, applied in luminescent materials, chemical instruments and methods, alumina/aluminum hydroxide and other directions, can solve the problems of high synthesis temperature, difficult mixing of raw materials, unsatisfactory particle crystal shape, etc. The effect of high efficiency, short preparation period and long afterglow time

Inactive Publication Date: 2008-07-09
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline earth aluminate long afterglow materials are usually prepared by high-temperature solid-state sintering, but this method has disadvantages such as high synthesis temperature and difficult mixing of raw materials.
There have been many studies on the synthesis of nanomaterials by hydrothermal method, but the general hydrothermal method is usually co-precipitation followed by hydrothermal reaction, and the particle crystal shape is not ideal

Method used

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  • Aluminate luminescent material and preparation method thereof
  • Aluminate luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 0.98mol / l AlCl 3 Solution 50ml, 0.1mol / l Eu(NO 3 ) 3 Solution 2.8ml, 0.08984mol / l Dy(NO 3 ) 3 Solution 3.1ml, SrO 1.4506g, NH 4 HCO 3 20g, H 3 BO 3 0.0216g.

[0017] The above AlCl 3 solution with Eu(NO 3 ) 3 solution, Dy(NO 3 ) 3 The solution is mixed in a container, 20g of NH 4 HCO 3 Dubbed a 150ml solution and put it into another container. Use a peristaltic pump to inject the solutions in the two containers into the reaction vessel simultaneously (there is a small amount of NH in the reaction vessel 4 HCO 3 solution as the reaction bottom solution), heated to 50°C in a water bath, stirred while heating, and the reaction continued for two hours. Suction filtration and washing of the gel obtained by the reaction were repeated several times until CO 3 2- was removed. Disperse the gel with deionized water, add the above-ground SrO into the dispersed gel, oscillate ultrasonically, mix evenly, and then transfer to a hydrothermal kettle for hydrotherma...

Embodiment 2

[0020] 1.026mol / l AlCl 3 Solution 68ml, 0.095mol / l Eu(NO 3 ) 3 Solution 4.2ml, 0.08984mol / l Dy(NO 3 ) 3 Solution 4.5ml, SrO 2.0724g, NH 4 HCO 3 21g, H 3 BO 3 0.0312g.

[0021] Take the above AlCl 3 solution with Eu(NO 3 ) 3 solution, Dy(NO 3 ) 3 The solution was mixed in a container, 21g of NH 4 HCO 3 Dubbed a 150ml solution and put it into another container. Use a peristaltic pump to inject the solutions in the two containers into the reaction vessel simultaneously (there is a small amount of NH in the reaction vessel 4 HCO 3 solution as the reaction bottom solution), heated in a water bath at 80°C, stirred while heating, and the reaction continued for two hours. Suction filtration and washing of the gel obtained by the reaction were repeated several times until CO 3 2- was removed. Disperse the gel with deionized water, add the ground SrO to the dispersed gel, oscillate ultrasonically, mix evenly, and then transfer to a hydrothermal kettle for hydrotherma...

Embodiment 3

[0024] 5.023mol / l AlCl 3 Solution 100ml, 0.095mol / l Eu(NO 3 ) 3 Solution 30ml, 0.08984mol / l Dy(NO 3 ) 3 Solution 32ml, SrO 14.8709g, NH 4 HCO 3 100g, H 3 BO 3 0.2230g.

[0025] Take the above AlCl 3 solution with Eu(NO 3 ) 3 solution, Dy(NO 3 ) 3 The solution is mixed in a container, 100g of NH 4 HCO 3 Dubbed a 250ml solution and put it into another container. Use a peristaltic pump to inject the solutions in the two containers into the reaction vessel simultaneously (there is a small amount of NH in the beaker 4 HCO 3 solution as the reaction bottom solution), heated in a water bath at 80°C, stirred while heating, and the reaction continued for two hours. Suction filtration and washing of the gel obtained by the reaction were repeated several times until CO 3 2- was removed. Disperse the gel with deionized water, add the above-ground SrO into the dispersed gel, oscillate ultrasonically, mix evenly, then transfer to a hydrothermal kettle, and conduct a hyd...

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Abstract

The invention discloses a luminescent material of aluminate and a process for preparation. The material employs ionic water to prepare chloridate solution of Al and aqua fortis solution of Eu and Dy, mixes NH4HCO3 solution to deposit, after being heated and stirred, forms gel, scours and separates the gel and adds analytical pure SrO, after ultrasonically vibrating, stirring and hydrothermal reaction, mixing in H3BO3 solution , after drying sintering, luminescent material is obtained. The general formula is M (4-x-y), OmAl14 O25: Eux, REy, wherein x=0.001-0.08, y=0.001-0.08, M is strontium and RE is dysprosium. Compared with the prior art, the luminescent material of aluminate of the invention has the advantages of high luminous efficiency, long afterglow time, low energy consumption and short preparing circle, besides, the sintering of high temperature method is not serious, the particles are small and uniform. Compared with luminescence by co-precipitation method, the luminous efficiency is high, the afterglow time is long and the crystalling phase is pure.

Description

technical field [0001] The invention relates to the technical field of inorganic materials and their preparation, in particular to an inorganic long-lasting aluminate luminescent material and a preparation method thereof. Background technique [0002] The aluminate system long-lasting luminescent materials discovered and developed in the 1990s have excellent luminescence-storage characteristics. After a short period of light, they can last for more than 12 hours in the dark. As a new type of energy-saving and environmentally friendly materials, this type of phosphor has been widely used in the fields of architectural decoration, fire safety, transportation, military facilities, and daily necessities. Among such luminescent materials, the blue-green long-lasting phosphor Sr 4 al 14 o 25 :Eu 2+ , Dy 3+ It is favored because of its advantages of high luminous brightness, slow afterglow decay and low cost. [0003] In recent years, there have been more and more studies on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C01F7/02C09K11/80
Inventor 李强徐晓
Owner EAST CHINA NORMAL UNIV
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