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Method for preparing lutetium gadolinium oxide transparent ceramic scintillator

A technology of gadolinium oxide lutetium and transparent ceramics, which is applied in the field of preparation of gadolinium oxide lutetium transparent ceramic scintillators, which can solve the problems of long decay time, unusability, and large afterglow, and achieve the effect of simple method, low cost, and simple equipment

Inactive Publication Date: 2009-06-17
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Lu 2 o 3 :Eu scintillation ceramics have a long decay time (>1ms) and large afterglow, so they cannot be used for X-CT but can only be used for static imaging. Lu 2 o 3 contains 176 Radioactive isotope of Lu, higher background

Method used

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  • Method for preparing lutetium gadolinium oxide transparent ceramic scintillator
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  • Method for preparing lutetium gadolinium oxide transparent ceramic scintillator

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Embodiment 1

[0030] The preparation of transparent gadolinium lutetium oxide ceramics has four main steps, which are ceramic powder preparation, compression molding, sintering, annealing and processing.

[0031] Synthetic Gd 1.1 Lu 0.8 Eu 0.1 O 3 The transparent ceramic scintillator material uses lutetium nitrate, gadolinium nitrate and europium nitrate as starting materials, with a purity of 99.99%. The ratio is based on the stoichiometric ratio of lutetium nitrate: gadolinium nitrate: europium nitrate = 0.4: 0.55: 0.05. Add 0.001wt% neodymium nitrate when preparing the solution to suppress the afterglow. The above-mentioned rare earth nitrate is prepared into a nitrate solution, and then glycine is added to dissolve in the nitrate solution. The amount of glycine is 5 / 3 times that of nitrate. The prepared solution is placed in a ceramic crucible and heated on a heater. The temperature of the solution is increased to a certain degree to spontaneously ignite and emit gas to obtain a white loose...

Embodiment 2

[0038] The preparation of transparent gadolinium lutetium oxide ceramics has four main steps, which are ceramic powder preparation, compression molding, sintering, annealing and processing.

[0039] When synthesizing transparent ceramic scintillator materials, lutetium nitrate, gadolinium nitrate and europium nitrate are used as starting materials, and the purity is 99.99%. The ratio is based on the stoichiometric ratio of lutetium nitrate: gadolinium nitrate: europium nitrate = 0.09: 0.9: 0.01. When preparing the solution, 0.001wt% terbium nitrate is added to suppress the generation of afterglow. The above-mentioned rare earth nitrate is prepared into a nitrate solution, and then glycine is added to dissolve in the nitrate solution. The amount of glycine is 5 / 3 times that of nitrate. The prepared solution is placed in a ceramic crucible and heated on a heater. The temperature of the solution is increased to a certain degree and spontaneously ignites and emits gas to obtain a whit...

Embodiment 3

[0043] The preparation of transparent gadolinium lutetium oxide ceramics has four main steps, which are ceramic powder preparation, compression molding, sintering, annealing and processing.

[0044] When synthesizing the transparent ceramic scintillator material, lutetium nitrate, gadolinium nitrate and europium nitrate are used as starting materials, and the purity is 99.99%. The stoichiometric ratio of lutetium nitrate: gadolinium nitrate: europium nitrate = 0.9: 0.08: 0.02 is used for the ratio. The above-mentioned rare earth nitrate is prepared into a nitrate solution, and then glycine is added to dissolve in the nitrate solution. The amount of glycine is 5 / 3 times that of nitrate. The prepared solution is placed in a ceramic crucible and heated on a heater. The temperature of the solution is increased to a certain degree to spontaneously ignite and emit gas to obtain a white loose powder.

[0045] The above powder is pressed in a steel mold into a ceramic green embryo (φ10*10...

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Abstract

The invention discloses a method for preparing a transparent Gd2(1-x-y)Lu2xEu2yO3 ceramic scintillator. Gd2(1-x-y)Lu2xEu2yO3 ceramic powder is prepared by a combustion method which uses glycine as a combustion agent, the dry powder compression is adopted, then the pressureless sintering is performed in vacuum or reducing atmosphere, the sintering temperature is between 1,600 and 1,900 DEG C, and the transparent Gd2(1-x-y)Lu2xEu2yO3 ceramic scintillator can be obtained. The ceramic scintillator emits red light under the excitation of ultraviolet light or X rays, and can be used for scintillating materials of imaging and detection of medical and industrial X rays.

Description

Technical field [0001] The invention relates to a preparation method of a gadolinium lutetium oxide transparent ceramic scintillator, which belongs to the field of transparent ceramics, especially the field of scintillation ceramics. Background technique [0002] Rare earth ion Eu 3+ Doped cubic Gd 2 O 3 It is a very important luminescent and scintillating material. As early as 1964, Bril and Wanmaker studied its luminescence characteristics. In recent years, it has received extensive attention as a transparent ceramic scintillator and thin-film material. As an efficient red transparent ceramic scintillator, it has important application prospects in plasma imaging, high-definition TV, projection TV, flat panel display and other fields. As a scintillator, Gd 2 O 3 : Eu is a ceramic scintillator with excellent comprehensive performance. It will have very important application prospects in the field of high-resolution X-CT, X-ray security inspection imaging equipment and CCD coupled...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/622
Inventor 秦来顺吴云涛舒康颖史宏声柴文祥
Owner CHINA JILIANG UNIV
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