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X-ray excited rare-earth ion blended tungstate flash luminous material and its preparing method

A technology of rare earth ions and scintillation, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that fast imaging can only be used for static imaging, the cost of raw materials is high, and the wide application is limited, so as to facilitate mass production , low cost and safe operation

Inactive Publication Date: 2008-08-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used scintillation materials are mainly NaI:Tl, PbWO 4 、 Bi 4 Ge 3 o 12 etc. However, they all have some disadvantages, such as NaI:Tl is easy to deliquescence, long afterglow, PbWO 4 Low luminous efficiency, Bi 4 Ge 3 o 12 Afterglow
[0004] In ceramic scintillators, Lu 2 o 3 :Eu 3+ The luminous intensity is high (23010ph / MeV), and the density is high (9.4g / cm 3 ), the main peak of the emission spectrum is around 610nm, which matches well with the spectral sensitivity of the CCD detector, so it has high contrast and high resolution for imaging, and some basic properties have surpassed the existing scintillation crystals, but its attenuation is slower (1.3ms), it is not suitable for dynamic fast imaging but can only be used for static imaging, and it is based on rare earth oxide (Lu 2 o 3 ) for doping rare earth ions (Eu 3+ ), which makes its raw material cost high, which greatly limits its wide application (F.A.DiBianca; J-P J.Georges; D.A.Cusano; C.D.Greskovich, Rare earthceramic scintillator, US patent 4525628,1985; Lempicki A. , Brecher C., Szuprycznski, P., et al.Nucl.Instr.Meth.in Phy.Res.A, 488(2002)579~590)

Method used

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  • X-ray excited rare-earth ion blended tungstate flash luminous material and its preparing method
  • X-ray excited rare-earth ion blended tungstate flash luminous material and its preparing method
  • X-ray excited rare-earth ion blended tungstate flash luminous material and its preparing method

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Effect test

Embodiment 1

[0017] Weigh Lu 2 O 3 (99.99%) 0.716 g, WO 3 (Analytical grade) 0.464 g, Eu 2 O 3 (99.99%) 0.070g, add absolute ethanol (analytical purity) as a medium, grind and mix thoroughly in an agate mortar, put the obtained mixture into an alumina crucible with a size of 30mm×Φ30mm, and cover the crucible lid. Put it into the Fe-Cr-Al wire heating muffle furnace, heat up from room temperature to 1100°C at a heating rate of 5°C per minute, keep it for 24 hours, and take it out after natural cooling. After grinding, the white product is Lu 1.80 Eu 0.20 WO 6 Red luminous scintillating material.

Embodiment 2

[0019] Weigh Lu 2 O 3 (99.99%) 0.637 g, WO 3 (Analytical grade) 0.464 g, Eu 2 O 3 (99.99%) 0.141 g, using ethanol as the medium, the Al 2 O 3 Grind it in a mortar to make it evenly mixed, then place it in Al 2 O 3 In the crucible, add a lid, put it into a silicon carbide rod furnace at a heating rate of 8°C / min to 1100°C for synthesis. The white product is Lu 1.60 Eu 0.40 WO 6 Red luminous scintillating material.

Embodiment 3

[0021] Weigh Y 2 O 3 (99.99%) 0.644 g, WO 3 (Analytical grade) 0.696 g, Eu 2 O 3 (99.99%) 0.053 grams, the rest is the same as in Example 1. The white product is Y 1.90 Eu 0.10 WO 6 Red luminous scintillating material.

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Abstract

The present invention relates to flashing luminescent material technology, and is especially flashing luminescent material with relatively high light output under the excitation of X-ray or other high energy ray and slow attenuation and its preparation process. The flashing luminescent material is trivalent RE ion activated RE tungstate in the chemical composition of RE2(1-x)Eu2xWO6, where, RE is at least one of Y, La, Gd and Lu, x is the content of activator Eu3+, and 0.05 C09K 11 / 78 2 5 2 2006 / 6 / 9 1858150 2006 / 11 / 8 100412157 2008 / 8 / 20 2008 / 8 / 20 2008 / 8 / 20 Shanghai Inst. of Ceramic Chemistry and Technology, CAS Shanghai 200050 Zhang Zhijun Zhao Jingtai Duan Chengjun Yuan Junlin Wang Xiaojun Chen Haohong Yang Xinxin pan zhen 31002 Shanghai Patent Agency of the Chinese Academy of Sciences No.319 Yueyang Road, Shanghai 200031

Description

Technical field [0001] The invention relates to a tungstate scintillation luminescent material doped with rare earth ions excited by X-rays and a preparation method thereof, and more particularly to a rare earth europium ion (Eu 3+ ) Doped rare earth tungstate scintillation luminescent material and preparation method thereof. The scintillation luminescent material has strong red luminescence under the action of X-rays, and can be used in technical fields such as X-ray medical imaging, high-energy ray safety detection and the like. Background technique [0002] Scintillation luminescent materials belong to a class of materials that can emit part of the absorbed energy in the form of ultraviolet or visible light after being radiated by X-rays, gamma rays and other high-energy rays. The greater the number of photons emitted by the scintillation material after receiving specific energy irradiation, the more helpful it is to improve the accuracy of the detection signal, the greater th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 张志军赵景泰段成军袁军林王小军陈昊鸿杨昕昕
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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