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Sodium barium ytterbium ion co-doped yag ultrafast scintillation crystal and preparation method thereof

A technology of scintillation crystals and ytterbium ions, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problem of low luminescence yield and achieve the effect of good appearance, excellent optical and physical and chemical properties

Active Publication Date: 2018-03-20
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its luminescence yield is low, only 1250Ph / MeV, which severely limits the application of Yb:YAG as an inorganic ultrafast scintillation crystal with superior performance.

Method used

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  • Sodium barium ytterbium ion co-doped yag ultrafast scintillation crystal and preparation method thereof
  • Sodium barium ytterbium ion co-doped yag ultrafast scintillation crystal and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: pulling method grows Na + 、Ba 2+ The doping concentration is 0.01at%, Yb 3+ The doping concentration is 5% Na 0.0003 Ba 0.0003 :Yb 0.15 Y 2.8494 al 5 o 12 scintillation crystal

[0027] Firstly, each high-purity oxide powder is properly pre-dried in air to remove adsorbed water, and burned at 1000°C for 10h, and then Na 2 O: ≥99.99%, BaO: ≥99.99%, Yb 2 o 3 :≥99.999%, Y 2 o 3 :≥99.999%, Al 2 o 3 :≥99.999% The raw materials are weighed and batched according to the molar ratio. The raw materials are fully mixed and pressed into blocks with an isostatic press, then put into an alumina crucible, put into a muffle furnace for sintering, and take 10 hours to raise the temperature to 1300°C, keep the temperature for 10 hours, and then cool down to room temperature for 10 hours , take out the block and put it into the iridium crucible; use the pulling method to grow Na 0.0003Ba 0.0003 :Yb 0.15 Y 2.8494 al 5 o 12 Ultra-fast scintillation crystal...

Embodiment 2

[0028] Embodiment 2: pulling method grows Na + 、Ba 2+ The doping concentration is 0.05at%, Yb 3+ Doping concentration is 15% Na 0.0015 Ba 0.0015 :Yb 0.45 Y 2.547 al 5 o 12 scintillation crystal

[0029] Firstly, each high-purity oxide powder is properly pre-dried in air to remove adsorbed water, and burned at 1000°C for 10h, and then Na 2 O: ≥99.99%, BaO: ≥99.99%, Yb 2 o 3 :≥99.999%, Y 2 o 3 :≥99.999%, Al 2 o 3 :≥99.999% The raw materials are weighed and batched according to the molar ratio. The raw materials are fully mixed and pressed into blocks with an isostatic press, then put into an alumina crucible, put into a muffle furnace for sintering, and take 10 hours to raise the temperature to 1300°C, keep the temperature for 10 hours, and then cool down to room temperature for 10 hours , take out the block and put it into the iridium crucible; use the pulling method to grow Na 0.0015 Ba 0.0015 :Yb 0.45 Y 2.547 al 5 o 12 Ultra-fast scintillation crystal: Zi...

Embodiment 3

[0030] Embodiment 3: pulling method grows Na + 、Ba 2+ The doping concentration is 1at%, Yb 3+ Doping concentration is 30% Na 0.03 Ba 0.03 :Yb 0.9 Y 2.04 al 5 o 12 scintillation crystal

[0031] Firstly, each high-purity oxide powder is properly pre-dried in air to remove adsorbed water, and burned at 1000°C for 10h, and then Na 2 O: ≥99.99%, BaO: ≥99.99%, Yb 2 o 3 :≥99.999%, Y 2 o 3 :≥99.999%, Al 2 o 3 :≥99.999% The raw materials are weighed and batched according to the molar ratio. The raw materials are fully mixed and pressed into blocks with an isostatic press, then put into an alumina crucible, put into a muffle furnace for sintering, and take 10 hours to raise the temperature to 1300°C, keep the temperature for 10 hours, and then cool down to room temperature for 10 hours , take out the block and put it into the iridium crucible; use the pulling method to grow Na 0.03 Ba 0.03 :Yb 0.9 Y 2.04 al 5 o 12 Ultra-fast scintillation crystal: Zirconia and alum...

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Abstract

The invention discloses a sodium, barium and ytterbium ion co-doped YAG ultrafast scintillation crystal and a preparation method thereof. The chemical formula of the sodium, barium and ytterbium ion co-doped YAG crystal is Na3xBa3yYb3zY3(1-x-y-z)Al5O12, wherein x=0.0001-0.01, y=0.0001-0.01, z=0.05-0.3, x refers to doping concentration of sodium ion, y refers to doping concentration of Ba ion, z refers to doping amount of Yb ion, and the Na ion, the Ba ion and the Yb ion all replace Y ion lattices when entering the crystal. The Na3xBa3yYb3zY3(1-x-y-z)Al5O12 ultrafast scintillation crystal has the advantages of high light yield and high resistance to radiation damage and can be applied in the fields of ultrafast pulse radiation detection, inertial confinement nuclear fusion, spatial radiation detection and nuclear reaction kinetics study.

Description

technical field [0001] The invention relates to a scintillation crystal, in particular to a sodium barium ytterbium ion co-doped YAG ultrafast scintillation crystal and a preparation method thereof. Background technique [0002] Inorganic scintillation crystals are crystalline energy converters that can convert the energy of high-energy photons (X / γ-rays) or particles (protons, neutrons, etc.) into easily detectable ultraviolet / visible photons. Detectors made of scintillation crystals are widely used in fields such as high-energy physics, nuclear physics detection and imaging, imaging nuclear medicine diagnosis (XCT, PET), geological exploration, astronomy and space physics, and safety inspection. With the rapid development of nuclear detection and related technologies, the application fields of scintillation crystals continue to expand. Different application fields put forward higher requirements for scintillation crystals, and traditional scintillation crystals such as Na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B11/00C30B15/00
CPCC30B11/00C30B15/00C30B29/22
Inventor 侯晴陈建玉齐红基韩和同宋朝辉张侃
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI