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Gadolinium tantalate transparent luminescent thick film and method for making same

A technology of gadolinium tantalate and luminescent thin film, which is applied in the field of luminescent thick film preparation, to achieve the effects of easy realization, strong resistance to radiation damage, and controllable structure

Inactive Publication Date: 2009-12-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no Eu 3+ , Tb 3+ doped GdTaO 4 Related reports on transparent luminous thick film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Gd 0.88 Eu 0.12 TaO 4 Preparation of transparent thick films

[0022] At room temperature, use a mixed solution of 12ml of concentrated hydrochloric acid and 8ml of 2-methoxyethanol to dissolve 4g of TaCl by heating at 50°C 5 . 4ml of concentrated HNO 3 Add 3.5ml of 2-methoxyethanol, then 1.78g of Gd 2 o 3 and 0.24g of Eu 2 o 3 Add to this solution, heat and stir at 50 degreeC, and dissolve an oxide. This solution was added to the 5 In a clear solution of , the mixture was stirred for half an hour and then left to cool at room temperature. Another 0.8gPVP (molecular weight 1.3×10 6 ) was dissolved in a mixed solution of 16ml of 2-methoxyethanol and 8ml of deionized water at room temperature, and 10ml of the solution was dropped into the aforementioned mixed solution, stirred for half an hour and allowed to stand. After the solution was aged at 0° C. for 12 hours, the sol required for coating was obtained. Choose clean quartz or optical glass as the substrat...

Embodiment 2

[0024] Gd 0.96 Eu 0.04 TaO 4 Preparation of transparent thick films

[0025] At room temperature, use a mixed solution of 12ml of concentrated hydrochloric acid and 8ml of 2-methoxyethanol to dissolve 4g of TaCl by heating at 80°C 5 . 4ml of concentrated HNO 3 Add 3.5ml of 2-methoxyethanol, then 1.94g of Gd 2 o 3 and 0.08g of Eu 2 o 3 Add to this solution, heat and stir at 80 degreeC, and dissolve an oxide. This solution was added to the 5 In a clear solution of , the mixture was stirred for 1 hour and left to cool at room temperature. Another 0.8gPVP (molecular weight 1.3×10 6) was dissolved in a mixed solution of 16ml of 2-methoxyethanol and 8ml of deionized water at room temperature, and 10ml of the solution was dripped into the aforementioned mixed solution, and allowed to stand after stirring for 1.5 hours. After aging the solution for 24 hours at 0° C., the required sol for coating was obtained. Choose clean quartz or optical glass as the substrate, and use ...

Embodiment 3

[0027] Gd 0.88 Tb 0.12 TaO 4 Preparation of transparent thick films

[0028] At room temperature, use a mixed solution of 12ml of concentrated hydrochloric acid and 8ml of 2-methoxyethanol to dissolve 4g of TaCl by heating at 50°C 5 . 5ml of concentrated HNO 3 Add 3.5ml of 2-methoxyethanol, then 1.78g of Gd 2 o 3 and 0.25g of Tb 4 o 7 Add to this solution, heat and stir at 60 degreeC, and dissolve an oxide. This solution was added to the 5 In a clear solution of , the mixture was stirred for 40 minutes and left to cool at room temperature. Another 0.8gPVP (molecular weight 1.3×10 6 ) was dissolved in a mixed solution of 16ml of 2-methoxyethanol and 8ml of deionized water at room temperature, and 11ml of the solution was dropped into the aforementioned mixed solution, stirred for half an hour and allowed to stand. The solution was aged at 0° C. for 18 hours to obtain the sol required for coating. Choose clean quartz or optical glass as the substrate, and use the me...

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Abstract

The invention belongs to the technical field of preparation of luminescent thick films, and in particular relates to a transparent luminescent thick film of gadolinium tantalate and a preparation method thereof. The chemical expression of the luminescent film is: Gd1-xRxTaO4, wherein R is Eu3+ or Tb3+, 0.04≤x≤0.12. The specific steps are: heat and dissolve Gd2O3 and Eu2O3 or Gd2O3 and Tb4O7 with 2-methoxyethanol solution of nitric acid; heat and dissolve TaCl5 with a mixed solution of 2-methoxyethanol and concentrated hydrochloric acid, mix according to stoichiometry, and cool to Room temperature, standby; dissolve PVP in the mixed solution of 2-methoxyethanol and deionized water at room temperature, then drop the solution into the mixed solution mentioned above, stir, stand still, and age to obtain the coating The required sol: use quartz glass as the substrate, use the spin coating method to coat the film, perform dry gelation treatment on the spin-coated wet gel film, and then in the programmed temperature control furnace, at a heating rate of 2°C / min, Raise the temperature from 400°C to 1200°C, keep it warm at this temperature for 2 hours, and cool down to room temperature naturally to obtain the required luminescent film, the average single-layer thickness of which is about 1 μm. The process of the invention is simple and convenient, and the prepared thin film has high luminous intensity, is uniform and transparent, is compact and has no cracks, and has good adhesion to the substrate.

Description

technical field [0001] The invention belongs to the technical field of preparation of luminescent thick films, and in particular relates to a transparent luminescent thick film of gadolinium tantalate and a preparation method thereof. Background technique [0002] Luminescent film is an important functional material. Compared with display screens made of traditional phosphors, luminescent film shows its superiority in terms of contrast, heat conduction, uniformity, and adhesion to the substrate. In recent years, with the development of X-ray microscopic imaging technology, the X-ray luminescent coating prepared by traditional phosphor powder is affected by the scattering of phosphor particles, and the spatial resolution of X-ray CCD can only reach tens of microns. level, which restricts the further improvement of the spatial resolution of the X-ray CCD. Using transparent inorganic thin film scintillation material as the X-ray-visible light conversion medium, and matching it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 顾牡刘小林韩坤黄世明倪晨刘波
Owner TONGJI UNIV
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