Low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic and preparation method thereof

A technology of scintillation ceramics and ion doping, which is applied to low-valence ion-doped 3Al5O12 scintillation transparent ceramics, low-valence ion-doped LuAG:Ce, Me scintillation transparent ceramics and their preparation fields, can solve the problem of obtaining luminescent properties. major breakthroughs, etc., to achieve the effects of huge application potential, low production cost, and simple process

Pending Publication Date: 2018-06-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the performance of the prepared lutetium aluminum garnet transparent ceramics has certain limitations. So far, no major breakthrough has been made in the study of the luminescence properties of LuAG:Ce scintillation ceramics.

Method used

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  • Low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic and preparation method thereof
  • Low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic and preparation method thereof
  • Low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0059] Embodiment 1 x=0.003, y=0.001, (Lu 0.996 Ce 0.003 Li 0.001 ) 3 Al 5 o 12

[0060] Activated ion Ce 3+ The concentration is 0.3at.%, low price Li + The doping concentration is 0.1 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 and LiOH·H 2 O raw material powder according to the stoichiometric ratio (Lu 0.996 Ce 0.003 Li 0.001 ) 3 Al 5 o 12 Weigh it, use absolute ethanol as the ball milling medium, and mill it on a high-energy ball mill for 10 hours at a ball milling speed of 80 rpm / min. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a vacuum furnace at a temperature of 1750°C for 20 hours. The ceramic samples obtained by vacuum sintering were annealed in an air atmosphere at 1400°C for 8 hours, then mechanically thinned and polished to obtain dense and transparent LuAG: 0.3% Ce, 0.1% Li scintillation trans...

Embodiment 2

[0061] Embodiment 2 x=0.003, y=0.003, (Lu 0.994 Ce 0.003 Li 0.003 ) 3 Al 5 o 12

[0062] Activated ion Ce 3+ The concentration is 0.3at.%, low price Li + The doping concentration is 0.3 at.%. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 and LiOH·H 2 O raw material powder according to the stoichiometric ratio (Lu 0.994 Ce 0.003 Li 0.003 ) 3 Al 5 o 12 Weigh it, use absolute ethanol as the ball milling medium, and mill it on a high-energy ball mill for 8 hours at a ball milling speed of 120 rpm / min. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a vacuum furnace at a temperature of 1880°C for 30 hours. The ceramic samples obtained by vacuum sintering were annealed in an air atmosphere at 1500°C for 12 hours, then mechanically thinned and polished to obtain dense and transparent LuAG: 0.3% Ce, 0.3% Li sparkling transpar...

Embodiment 3

[0063] Embodiment 3 x=0.003, y=0.002, (Lu 0.995 Ce 0.003 Li 0.001 Mg 0.001 ) 3 Al 5 o 12

[0064] Activated ion Ce 3+ The concentration of Li and Mg is 0.3 at.%, and the doping concentration of low-valent Li and Mg is 0.05 at.% and 0.1 at.%, respectively. Commercially available Lu with a purity of 99.99% 2 o 3 , Al 2 o 3 , CeO 2 , MgO and Li 2 O raw material powder according to (Lu 0.995 Ce 0.003 Li 0.001 Mg 0.001 ) 3 Al 5 o 12 The chemical formula was weighed, and absolute ethanol was used as the ball milling medium, and ball milled on a high-energy ball mill for 15 hours with a ball milling speed of 100rmp / min. The ball-milled slurry was dried and sieved, followed by dry pressing and cold isostatic pressing to obtain a ceramic green body. The green body was sintered in a vacuum furnace at a temperature of 1850°C for 20 hours. The ceramic samples obtained by vacuum sintering were annealed in a mixture of oxygen and air for 20 hours at an annealing tempera...

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Abstract

The invention relates to low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic and a preparation method thereof. The general formula of constitution of the scintillation ceramic is (Lu1-x-yCexMey)3 Al5O12; Me is one of Ca<2+>, Ba<2+>, Zn<2+>, Li<+> and Na<+> ions, or at least two of Ca<2+>, Ba<2+>, Zn<2+>, Li<+>, Mg<2+> and Na<+> ions, wherein x is more than 0 and less than or equal to 0.05, and y is more than 0 and less than or equal to 0.1. The preparation method disclosed by the invention has the advantages of simple process, low production cost and the like. The prepared low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic has relatively strong light emission under stimulation of ultraviolet or visible light or X-ray or gamma-ray, and a stimulated emission wavelengthof the low-valence-state ion-doped LuAg: Ce, Me scintillation ceramic is matched with a sensitive region of a photoelectric detector; therefore, the scintillation ceramic has huge application potential in the field of high-energy ray detection.

Description

technical field [0001] The present invention relates to a kind of low valence state ion (being specifically Ca 2+ , Ba 2+ , Zn 2+ , Li + and Na + One of them or their combination or they and Mg 2+ Combination) doped LuAG:Ce, Me scintillation transparent ceramics and its preparation method, and low valence ion doped (Lu 1-x-y Ce x Me y ) 3 Al 5 o 12 Glittering clear ceramic. The invention belongs to the technical field of preparation of optical functional transparent ceramics. Background technique [0002] Scintillator refers to a photoelectric functional material that flashes under the action of radiation or nuclear particles. As the core component of a beam energy detector, it is used in high-energy physics, imaging nuclear medicine (XCT and PET), industrial CT online monitoring, oil well exploration, It has a wide range of applications in fields such as security inspection and anti-terrorism applications. [0003] With the rapid development of nuclear science ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/64
CPCC04B35/44C04B35/64C04B2235/3201C04B2235/3203C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3284C04B2235/445
Inventor 刘书萍冯锡淇寇华敏王伟吴乐翔石云李江潘裕柏郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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