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Samarium doping gadolinium aluminate base fluorescent powder body and preparation method thereof

A fluorescent powder and alumina technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of easy introduction of impurities, high heat treatment temperature, etc., and achieve the effect of simple and easy process, uniform particle size distribution, and easy access to raw materials

Inactive Publication Date: 2008-09-17
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple in process and easy to produce in batches; the disadvantage is that the heat treatment temperature is high, and impurities are easy to be introduced during the ball milling process (the impurities come from the calcined product except the main crystal phase GAP, often remaining a small amount of mesophase Gd 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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  • Samarium doping gadolinium aluminate base fluorescent powder body and preparation method thereof
  • Samarium doping gadolinium aluminate base fluorescent powder body and preparation method thereof
  • Samarium doping gadolinium aluminate base fluorescent powder body and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Get 7.252g gadolinium oxide, 0.6976g samarium oxide and dissolve in the acetic acid that 50ml concentration is 0.2mol / L, temperature is 65 ℃; Get 15.006g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) Dissolve in the above solution and stir until uniform; then add 7.44g of ethylene glycol, stir and evaporate the solution at 70°C to obtain a white transparent gel; grind the dried gel powder, and pre-calcine at 600°C for 3 hours in an air atmosphere , the heating rate is 4°C / min; after grinding the calcined powder, it is sintered at 1000°C for 4h in the air atmosphere to obtain the final product GdAlO 3 :Sm 0.1 . The XRD pattern of the prepared powder is figure 1 , near-ultraviolet / blue light excitation spectrum such as figure 2 shown.

Embodiment 2

[0021] Get 7.252g gadolinium oxide, 0.3488g samarium oxide and dissolve in the acetic acid that 50ml concentration is 0.3mol / L, temperature is 60 ℃; Get 15.006g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) Dissolve in the above solution and stir until uniform; then add 14.88g of ethylene glycol, stir and evaporate the solution at 65°C to obtain a white transparent gel; grind the dried gel powder, and pre-calcine at 700°C for 2.5 h, heating rate 5°C / min; after grinding the calcined powder, sintering at 1300°C for 4h in air atmosphere to obtain the final product GdAlO 3 :Sm 0.05 . The XRD pattern and near-ultraviolet / blue light excitation pattern of the prepared powder are similar to Example 1.

Embodiment 3

[0023] Get 7.252g gadolinium oxide, 0.6976g samarium oxide, 0.0746g dysprosium oxide and be dissolved in 50ml concentration and be 0.25mol / L, the temperature is in the acetic acid of 70 ℃; Get 15.006g aluminum nitrate (Al(NO 3 ) 3 9H 2 O) Dissolve in the above solution and stir until uniform; then add 11.16g of ethylene glycol, stir and evaporate the solution at 65°C to obtain a white transparent gel; grind the dried gel powder, and pre-calcine at 800°C for 3h in an air atmosphere , the heating rate is 3°C / min; after grinding the calcined powder, it is sintered at 1200°C for 3h in the air atmosphere to obtain the final product GdAlO 3 :Sm 0.1 Dy 0.01 . The XRD pattern and near-ultraviolet / blue light excitation pattern of the prepared powder are similar to Example 1.

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Abstract

The invention relates to a samarium doped gadolinium aluminate phosphor powder body and a preparation method thereof. The chemical constituent formula of the phosphor powder body is Gd1-x1-x2A1yOz:Smx1, Rex2, wherein the y value range is 0 to 5 / 3, the RE is the rare earth element ion and / or one or more of transition metal ions, the X1 is Sm doped gram molecular weight and is larger than 0.01 and smaller than 0.1, the X2 is RE doped gram molecular weight, and the content is 1 to 0.1 time of the content of Sm. The invention adopts the preparation process that gadolinium oxide, samarium oxide and RE iron in the stoichiometric ratio are dissolved in acetic acid at 60 to 70 DEG C, then aluminium nitrate is added and is uniformly stirred; ethylene glycol is mixed into the reacting solution according to the mole number of the ethylene glycol / the mole number of metallic ion being over than or equal to 3 and less than or equal to 1.5, and is uniformly stirred; the solution is stirred and vaporized at 60 to 70 DEG C, then is dried and ground, pre-burning is performed for 2 to 3 h at 600 to 800 DEG C in air atmosphere, and the temperature increasing speed is less than and equal to 5 DEG C / min; after the pre-burnt powder is ground, agglomeration is performed for 3 to 4 h over 1000 DEG C in air atmosphere. The processing is simple, the materials are cheap and available, and the powder has large luminescent intensity and even grain size distribution under the stimulation of the blue light and the near ultraviolet.

Description

technical field [0001] The invention relates to a samarium main doping activated gadolinium aluminate-based fluorescent powder and a preparation method thereof, belonging to the field of luminescent powder materials. Background technique [0002] Gadolinium aluminate-based luminescent material (Gd 1-x al y o z :RE x , RE is a rare earth element ion and / or transition metal ion) has excellent optical properties, mechanical properties and stable physical and chemical properties. Compared with the more mature yttrium aluminate-based luminescent materials, the material matrix component of this system has a large absorption coefficient. As a new optical matrix material, its application is attracting people's attention. The crystal form material of this material system is an ideal solid-state laser material, and its transparent ceramic body is also widely used, and the powder emits visible light under the excitation of ultraviolet, vacuum ultraviolet, X-ray, high-energy particl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 罗岚周浪魏秀琴熊志华
Owner NANCHANG UNIV
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