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Rare earth silicate double salt scintillating material and preparation method thereof

A technology of scintillation materials and rare earth nitrates, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of unfavorable crystal growth, low luminous efficiency, and more energy consumption, and achieve good physical and chemical stability and scintillation performance, The effect of low melting point

Inactive Publication Date: 2015-08-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently widely used scintillation materials are bismuth germanate (Bi4Ge3O12), barium fluoride (BaF2), thallium-doped sodium iodide (NaI: Tl), lead tungstate (PbWO4), etc., these materials are Some disadvantages: Bi4Ge3O12 low light yield; BaF2 decays slowly ; NaI: Tl is easy to deliquescence; PbWO4 has low luminous efficiency, etc.
This material has poor light yield and high temperature resistance, and the synthesis process is not easy to operate because of cadmium and fluorine

Method used

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  • Rare earth silicate double salt scintillating material and preparation method thereof
  • Rare earth silicate double salt scintillating material and preparation method thereof
  • Rare earth silicate double salt scintillating material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh silicon dioxide (SiO 2 ) 0.9013 g, anhydrous sodium carbonate (Na 2 CO 3 ) 0.7949 g, lutetium oxide (Lu 2 o 3 ) 0.9848 g, cerium oxide (CeO 2 ) 0.0043 g, ground and mixed evenly in a mortar, transferred to an alumina crucible, put the crucible into a large alumina crucible, then put the large crucible into a heating furnace, and calcined at 1100 °C for 8 Hours, naturally cooled to room temperature, and ground to obtain powder scintillation material.

Embodiment 2

[0029] Weigh silicon dioxide (SiO 2 ) 0.9013 g, anhydrous sodium carbonate (Na 2 CO 3 ) 0.7949 g, lutetium oxide (Lu 2 o 3 ) 0.9848 g, cerium oxide (CeO 2 ) 0.0086 g, ground and mixed evenly in a mortar, transferred to an alumina crucible, put the crucible into a large alumina crucible, then put the large crucible into a heating furnace, and calcined at 1100 °C for 8 Hours, naturally cooled to room temperature, and ground to obtain powder scintillation material.

Embodiment 3

[0031] Weigh silicon dioxide (SiO 2 ) 0.9013 g, anhydrous sodium carbonate (Na 2 CO 3 ) 0.7949 g, lutetium oxide (Lu 2 o 3 ) 0.9848 g, cerium oxide (CeO 2 ) 0.0258 g, ground and mixed evenly in a mortar, transferred to an alumina crucible, put the crucible into a large alumina crucible, then put the large crucible into a heating furnace, and calcined at 1100 °C for 8 Hours, naturally cooled to room temperature, and ground to obtain powder scintillation material.

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Abstract

The invention belongs to the technical field of scintillating materials, and particularly discloses a rare earth silicate double salt scintillating material and a preparation method thereof. The chemical constitution formula of the rare earth silicate double salt scintillating material is M<3>RE<1-x>Ce<x>Si<3>O<9>, wherein x is a molar ratio of RE replaced by Ce, and x is greater than 0 and less than or equal to 0.3; M is selected from one or more of Li, Na, K, Rb and Cs; RE is selected from one or more of La, Gd, Y and Lu. The scintillating material can emit strong fluorescence when being excited by X-ray; the luminescence wavelength is 320-580 nm; the fluorescence lifetime when the scintillating material is excited by ultraviolet is about 30 ns; the rare earth silicate double salt scintillating material can stably exist in the air, is excellent in physical and chemical stability and scintillation property, and has the practical application value.

Description

technical field [0001] The invention relates to the technical field of scintillation materials, and more specifically, to a rare earth silicate double salt scintillation material and a preparation method thereof. Background technique [0002] Scintillation materials are luminescent materials that can produce high-efficiency fluorescence emission under the excitation of high-energy rays. Under the irradiation of X-ray, γ-ray or other charged particles, the scintillation material emits fluorescence, and the photosensitive device (such as photomultiplier tube, CCD, photodiode, etc.) converts the fluorescence emitted by the material into an amplified electrical pulse, Then it is recorded by electronic instruments to realize the detection of high-energy ray signals. [0003] In recent decades, scintillation materials have been greatly developed due to their wide application in high-energy physics, high-energy ray, nuclear medical imaging, and industrial non-destructive detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
Inventor 钟玖平周建邦梁宏斌苏锵
Owner SUN YAT SEN UNIV
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