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Nanometer rare-earth compound luminescent material and preparation method thereof

A technology of luminescent materials and nano-rare earths, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unreasonable structure of rare earth industry, low overall product quality, and few varieties and specifications

Inactive Publication Date: 2009-10-07
DONGGUAN JIEMING LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After about 20 years of hard work in the nanomaterial industry, the current technology and production capacity have become increasingly mature. Under this condition, rare earth luminescent materials can be further developed into nanometer rare earth luminescent materials. At present, the structure of the domestic rare earth industry is unreasonable and the technology content is not high. More than 60% depend on exports, the overall quality of products is not high, and there are few varieties and specifications; the proportion of high-tech content and high value-added products is relatively low, and there are not many forward-looking and cutting-edge technologies, which leads to slow development of corresponding industries and high costs. high
[0005] The high-temperature solid-state method has been widely used in the synthesis of phosphors, but this method often results in impaired luminescent properties of the synthesized powder and requires a high calcination temperature
In addition, the particle size of the phosphor powder synthesized by the high-temperature solid-state method is about tens of microns, and the smaller phosphor powder is obtained by ball milling the large particle powder, and experiments show that after ball milling, the phosphor powder will Lead to more defects, and the luminous efficiency is significantly reduced

Method used

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  • Nanometer rare-earth compound luminescent material and preparation method thereof
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Examples

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Effect test

Embodiment 1

[0017] Take 52.52 grams of Al(NO 3 ) 3 9H 2 O, 8.46 g Sr(NO 3 ) 2 Dissolve in distilled water in a 250ml beaker to obtain a clear solution; in addition, weigh 0.0352 grams of Eu according to the stoichiometric ratio 2 o 3 , 0.0373 g Dy 2 o 3 Put it into a 50ml beaker and dissolve it with concentrated nitric acid, combine the two solutions, and then add 3.7 grams of H 3 BO 3 and 100 g CO(NH 2 ) 2 , magnetically stirred in a constant temperature water bath at 70°C for 2 hours. After fully stirring, transfer the solution to a 300ml porcelain crucible and quickly put it into a muffle furnace that has been preheated to 500°C. As the reaction progresses, it can be observed that The solution rapidly boils, evaporates, expands, burns and releases a large amount of ammonia gas. The whole process is completed within 5 minutes. After cooling, it can be observed that the product is light yellow mushroom cloud, loose and porous, and can be finely ground after a little grinding. ...

Embodiment 2

[0019] Take 52.52 grams of Al(NO 3 ) 3 9H 2 O and 8.46 g Sr(NO 3 ) 2 Dissolve in distilled water in a 250ml beaker to obtain a clear solution; weigh another 0.044 grams of Eu 2 o 3 , 0.047 g Dy 2 o 3 Put it into a 50ml beaker and dissolve it with concentrated nitric acid, combine the two solutions, and then add 3.7 grams of H 3 BO 3 and 100 g CO(NH 2 ) 2, stirred magnetically in a constant temperature water bath at 70°C for 2 hours. After fully stirring, the solution was transferred to a 300ml porcelain crucible and quickly placed in a muffle furnace that had been preheated to 500°C. As the reaction progressed, it could be observed that The solution rapidly boils, evaporates, expands, burns and releases a large amount of ammonia gas. The whole process is completed within 5 minutes. After cooling, it can be observed that the product is light yellow mushroom cloud, loose and porous, and can be finely ground after a little grinding. Light yellow powder, put the product...

Embodiment 3

[0021] Take 52.52 grams of Al(NO 3 ) 3 9H 2 O and 8.46 g Sr(NO 3 ) 2 Dissolve in distilled water in a 250ml beaker to obtain a clear solution; weigh another 0.053 grams of Eu 2 o 3 , 0.056 g Dy 2 o 3 Put it into a 50ml beaker and dissolve it with concentrated nitric acid, combine the two solutions, and then add 3.7 grams of H 3 BO 3 and 100 g CO(NH 2 ) 2 , stirred magnetically in a constant temperature water bath at 70°C for 2 hours. After fully stirring, the solution was transferred to a 300ml porcelain crucible and quickly placed in a muffle furnace that had been preheated to 500°C. As the reaction progressed, it could be observed that The solution rapidly boils, evaporates, expands, burns and releases a large amount of ammonia gas. The whole process is completed within 5 minutes. After cooling, it can be observed that the product is light yellow mushroom cloud, loose and porous, and can be finely ground after a little grinding. Light yellow powder, put the produc...

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Abstract

The invention relates to a luminescent material and a preparation method thereof, in particular to a nanometer rare-earth compound luminescent material and a preparation method thereof. The preparation method of the luminescent material adopts a combustion method to synthesize a precursor of Sr4Al14O25: Eu , Dy , then nanometer phosphor powder Sr4Al14O25: Eu , Dy are synthesized by a high-temperature calcination method on the precursor under the protection of N2 at the temperature of 1300 DEG C, the analyzed nanometer phosphor powder is showed as a single phase of Sr4Al14O25 by analyzing an XRD map, and the average grain diameter of the analyzed nanometer phosphor powder is ranged from 20 nm to 40 nm.

Description

Technical field: [0001] The invention relates to the technical field of luminescent materials and preparation methods thereof, in particular to a nano-rare earth composite luminescent material and a preparation method thereof. Background technique: [0002] With the development of society and the advancement of science and technology, the rare earth luminescent materials and non-rare earth luminescent materials in my country have been serialized from a single variety to multiple varieties and specifications. Today, low-pressure gas fluorescent lamps, high-intensity discharge lamps, and other related products have a footprint of rare earth luminescent materials. Rare earth materials are a huge treasure trove of luminescent materials. Among the various luminescent materials developed by humans, rare earth elements play a very important role. Since there are 4f orbitals in the electron configuration of rare earth element atoms, rare earth element atoms have abundant electronic...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 秦如新
Owner DONGGUAN JIEMING LIGHTING TECH
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