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Rare earth scintillator material with light guide structure, and preparation method and application thereof

A technology of scintillator materials and light guide structures, which is applied in the growth of polycrystalline materials, chemical instruments and methods, and crystal growth, can solve the problems of low X-ray conversion efficiency and reduced imaging resolution of image screens, and improve imaging resolution High efficiency, easy operation, and reduced scattering effect

Inactive Publication Date: 2018-03-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with CsI:Tl + The increase of the film thickness of the needle-like crystal will reduce the imaging resolution of the image screen, and the CsI:Tl + The X-ray conversion efficiency is lower than that of Gd 2 o 2 S:Tb 3+

Method used

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  • Rare earth scintillator material with light guide structure, and preparation method and application thereof
  • Rare earth scintillator material with light guide structure, and preparation method and application thereof
  • Rare earth scintillator material with light guide structure, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1 Y 0.997 Tb 0.003 AlO 3 / Al 2 o 3 Rare Earth Eutectic Scintillator Materials

[0030] A rare earth scintillator material with a light guiding structure, the chemical expression of the scintillator material is Y 0.997 Tb 0.003 AlO 3 / Al 2 o 3 , the preparation method of the scintillator material is as follows:

[0031] (1) Weigh the raw material yttrium oxide (Y 2 o 3 ) 2.5890g, terbium oxide (Tb 4 o 7 ) 0.0129g, alumina (Al 2 o 3 ) 3.9255g, add absolute ethanol as a dispersant to the raw material, put it into an alumina crucible after fully grinding in an agate mortar, put the crucible into a box-type muffle furnace, and heat up at 1400°C with a heating rate of 4°C / min. Sinter in a CO reducing atmosphere for 10 h, after the sample is cooled to room temperature, grind to powder to obtain the eutectic powder pre-sintered raw material;

[0032] (2) Put the pre-fired raw materials into an iridium crucible with a small hole at the bottom, place the iri...

Embodiment 2

[0034] Example 2 Y 0.95 Tb 0.05 AlO 3 / Al 2 o 3 Rare Earth Eutectic Scintillator Materials

[0035] Weigh raw material yttrium oxide (Y 2 o 3 ) 2.4670g, terbium oxide (Tb 4 o 7 ) 0.2150g, alumina (Al 2 o 3 ) 3.9255g, by the same method as in Example 1, obtain Y with a pull-down rate of 1.5 mm / min 0.95 Tb 0.05 AlO 3 / Al 2 o 3 Rare earth eutectic scintillator materials.

Embodiment 3

[0036] Example 3 Gd 0.99 Tb 0.01 AlO 3 / Al 2 o 3 Rare Earth Eutectic Scintillator Materials

[0037] Weigh the raw material gadolinium oxide (Gd 2 o 3 ) 4.1270g, terbium oxide (Tb 4 o 7 ) 0.0430g, alumina (Al 2 o 3 ) 3.9255g, by the same method as in Example 1, obtain Gd with a pull-down rate of 2.0 mm / min 0.99 Tb 0.01 AlO 3 / Al 2 o 3 Rare earth eutectic scintillator materials.

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Abstract

The invention relates to a rare earth eutectic scintillator material with a light guide structure, and a preparation method and application thereof. The chemical expression formula of the eutectic scintillator material is RE1-xTbxAlO3 / Al2O3, wherein RE is one or more of rare earth Y, Gd and Lu and the value range of the x is that x is more than 0.003 and less than 0.8; and the scintillator material is obtained by the preparation steps of firing, melting, growing an eutectic crystal and the like. The eutectic scintillator material provided by the invention has a sequential phase separation structure, and the scintillator phase in the eutectic crystal emits fluorescence and the fluorescence is propagated directionally along the phase under irradiation of high-energy rays, so scattering of the fluorescence in the material is avoided and the resolution ratio on high-energy ray detection imaging by the material is increased.

Description

technical field [0001] The invention relates to the field of scintillator materials, in particular to a rare earth scintillator material with a light-guiding structure, its preparation method and application. Background technique [0002] X-ray luminescent materials are a class of materials that can absorb X-rays and convert them into fluorescent emissions. They are widely used in medical imaging, industrial non-destructive testing, port security inspection, environmental monitoring, geological exploration, oil well drilling, and high-energy physics. . People have been researching and developing X-ray luminescent materials for more than 120 years. At present, there are more than ten kinds of X-ray luminescent materials with good performance, which can be used in X-ray imaging systems, making X-ray image detection the most popular inspection method in medical diagnosis. , It has also become an important means of industrial non-destructive testing and port security monitoring...

Claims

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Application Information

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IPC IPC(8): C30B29/24C30B15/08
CPCC30B15/08C30B29/24
Inventor 钟玖平刘芳
Owner SUN YAT SEN UNIV
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