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A low-temperature sintered scintillator material and its preparation method

A scintillator material and low-temperature sintering technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem of high sintering temperature, achieve good performance, simple preparation method, and increase light yield

Active Publication Date: 2020-12-15
厦门迈通光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a low-temperature sintered scintillator material and its preparation method, and solve the problems of high sintering temperature in the above-mentioned background technology

Method used

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  • A low-temperature sintered scintillator material and its preparation method

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Embodiment 1

[0030] Please check figure 1 , a method for preparing a low-temperature sintered scintillator material in this embodiment, comprising the following steps:

[0031] (1) Prepare the first solution: dissolve aluminum, silicon, and calcium in a mixed solution of concentrated hydrochloric acid and nitric acid to obtain the first solution; the molar ratio of aluminum, silicon, calcium, and acid is 0.93-1.6:0.2-0.5:0.2 -0.6:4.8-12;

[0032] (2) Preparation of the second solution: dissolving gadolinium, A, B, aluminum, and gallium in a mixed solution of concentrated hydrochloric acid and nitric acid to obtain a second solution, wherein A is at least one of lanthanum, lutetium, and yttrium or a combination thereof Ingredient, B is at least one or a combination of cerium, praseodymium, neodymium, promethium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium, ytterbium;

[0033] The molar ratio of gadolinium, A, B, aluminum, gallium and acid is 0.95-2.999:0.001-2:0.001-...

Embodiment 2

[0041] A method for preparing a low-temperature sintered scintillator material in this embodiment includes the following steps:

[0042] (1) Prepare the first solution: dissolve aluminum, silicon, and calcium in a mixed solution of concentrated hydrochloric acid and nitric acid to obtain the first solution; the molar ratio of aluminum, silicon, calcium, and acid is 0.93-1.6:0.2-0.5:0.2 -0.6:4.8-12;

[0043] (2) Preparation of the second solution: dissolving gadolinium, B, aluminum, and gallium in a mixed solution of concentrated hydrochloric acid and nitric acid to obtain a second solution, wherein B is cerium, praseodymium, neodymium, promethium, samarium, europium, terbium, and dysprosium , holmium, erbium, thulium, ytterbium at least one or a combination thereof;

[0044]The molar ratio of gadolinium, B, aluminum, gallium and acid is: 0.95-2.999:0.001-0.05:2-4:1-3:14.22-54.22;

[0045] The concentrated hydrochloric acid concentration is 37%, the concentrated nitric acid c...

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Abstract

The invention discloses a low-temperature sintered scintillating material and a preparation method thereof. The general formula of the low-temperature sintered scintillating material is (Gd3-x-yAxBy)(Al5-mGam)O12*k(Al2-4 / 3a-2 / 3bSiaCab)O3. During preparation, donor doping and receptor doping compensate each other to eliminate oxygen vacancy in crystal lattices so that the prepared low-temperature sintered scintillating material can avoid deterioration of afterglow performance; meanwhile, the doping mount of calcium and silicon is reasonably proportioned, so that the prepared low-temperature sintered scintillating material can improve the light yield.

Description

technical field [0001] The invention relates to a low-temperature sintered scintillator material and a preparation method thereof. Background technique [0002] The working procedure of CT-Computed Tomography is as follows: it converts the transmitted X-rays into photodetectors through the scintillator according to the difference in the absorption and transmittance of X-rays by different tissues of the human body. Then the intensity of the light is measured by the photodetector, and the obtained data is sent to the computer. After the computer processes the data, it can take a cross-sectional or three-dimensional image of the inspected part of the human body, and find any part of the body. Minor lesions. [0003] Scintillators are the core components of CT systems. Scintillator materials are a class of materials that can absorb high-energy rays and emit visible light. The basic properties of scintillator materials include light yield, decay time, afterglow, and X-ray stop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/622C09K11/77
CPCC04B35/50C04B35/622C04B2235/3208C04B2235/3217C04B2235/3286C04B2235/3418C04B2235/6567C04B2235/77C09K11/7766C09K11/7783
Inventor 王素霞张光飞
Owner 厦门迈通光电有限公司
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