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Garnet type gadolinium aluminate based fluorescent powder and method for making same

A gadolinium aluminate-based, garnet-type technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high heat treatment temperature, easy introduction of impurities, etc., and achieve uniform particle size distribution, simple and easy process, and luminescence. strong effect

Inactive Publication Date: 2005-09-07
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has simple process and is easy to produce in batches. The disadvantage is that the heat treatment temperature is high, and impurities are easily introduced during the ball milling process. 4 Al 2 o 9 (referred to as GAM) and Gd 3 Al 5 o 12 (GAG for short)

Method used

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  • Garnet type gadolinium aluminate based fluorescent powder and method for making same
  • Garnet type gadolinium aluminate based fluorescent powder and method for making same
  • Garnet type gadolinium aluminate based fluorescent powder and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Get 18.75g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 5.439g gadolinium oxide (Gd 2 o 3 ), 0.1056g europium oxide (Eu 2 o 3 ), 33.4g citric acid, and a sufficient amount of concentrated nitric acid were dissolved in deionized water, stirred to form a uniform solution and adjusted to a pH value of 7. The beaker containing the solution was placed on a magnetic stirrer, heated to 70°C and kept stirring, and a sol was formed after several hours. Continue stirring and heating until a clear gel forms. Put the gel into a box furnace and heat it to 400 °C to form a gray-black precursor powder. The precursor powder is then calcined at 900°C for 1.5 hours to obtain Gd 3 Al 5 o 12 :Eu(5%molGd) pale pink final product. figure 1 for Gd 3 Al 5 o 12 :Eu 3+ Fluorescence spectra of nanopowders excited by ultraviolet light, indicating that the luminescent ion Eu 3+ It enters the GAG ​​lattice in the form of solid solution, and emits red fluorescence under the excitation of ul...

Embodiment 2

[0018] Get 18.75g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 5.439g gadolinium oxide (Gd 2 o 3 ), 0.1016g praseodymium oxide (Pr 6 o 11 ), 33.4g citric acid, and a sufficient amount of concentrated nitric acid were dissolved in deionized water, stirred to form a uniform solution and adjusted to a pH of 3. The beaker containing the solution was placed on a magnetic stirrer, heated to 75°C and kept stirring, and a sol was formed after several hours. Continue stirring to form a transparent gel. Put the gel into a box furnace and heat it to 450°C to form a gray-black precursor powder, which is calcined at 1300°C for 2 hours to finally obtain Gd 3 Al 5 o 12 :Pr(5%molGd) pale pink final product. figure 2 for Gd 3 Al 5 o 12 :Pr 3+ The fluorescence spectrum of the nanopowder under ultraviolet light excitation shows that the luminescent ion Pr enters the GAG ​​lattice in the form of solid solution, and emits red fluorescence under the excitation of ultraviolet light (254nm)....

Embodiment 3

[0020] Get 18.75g aluminum nitrate (Al(NO 3 ) 3 9H 2 O), 5.493g gadolinium oxide (Gd 2 o 3 ), 0.1056g europium oxide (Eu 2 o 3 ), 0.0103g cerium oxide (CeO 2 ), 33.4g citric acid, and a sufficient amount of concentrated nitric acid were dissolved in deionized water, stirred to form a uniform solution and adjusted to a pH of 5. The beaker containing the solution was placed on a magnetic stirrer, heated to 80°C and kept stirring, and a sol was formed after several hours. Continue stirring to form a transparent gel. Put the gel into a box furnace and heat it to 450°C to form a gray-black precursor powder, which is calcined at 1200°C for 1.5 hours to finally obtain Gd 3 Al 5 o 12 :Eu, Ce light pink final product. image 3 for Gd 3 Al 5 o 12 : Fluorescence spectra of Eu, Ce nanopowders excited by ultraviolet light.

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Abstract

A kind of gadolinium aluminate based phosphor powder in garnet sand type and the preparing method. The chemical expression of the phosphor powder is Gd3(1-x)Al5O12:Rex or Gd3Al5(1-x)O12:Rex, among which the RE is rare-earth element such as Eu, Pr, Ce or Tb etc, RE can be one or more of the rare-earth element, x is doping gram molecular weight, 0.01 C09K 11 / 80 1 3 1 2005 / 3 / 21 1664063 2005 / 9 / 7 100347267 2007 / 11 / 7 2007 / 11 / 7 2007 / 11 / 7 Nanchang University Jiangxi 330047 Luo Lan Tan Dunqiang Zhou Lang

Description

technical field [0001] The invention belongs to the field of luminescent powder preparation, and in particular relates to a rare earth activated garnet-type gadolinium aluminate-based fluorescent powder and a preparation method. Background technique [0002] Gadolinium garnet aluminate (Gd 3 Al 5 o 12 , referred to as GAG) has excellent optical properties, mechanical properties and stable physical and chemical properties, and its application as a new type of optical matrix material is attracting people's attention. GAG belongs to the tetragonal crystal system, with fast growth rate, relatively small inner core, ideal distribution coefficient for dopants, and large absorption coefficient. Its crystal is an ideal solid-state laser matrix material. The powder doped with other ions (mainly rare earth element ions and transition metal ions) in GAG emits visible light under the excitation of ultraviolet and vacuum ultraviolet light, X-rays and high-energy particles, and is expe...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 罗岚谭敦强周浪
Owner NANCHANG UNIV
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