Rare earth garnet scintillation crystal and production method thereof

A technology of scintillation crystal and production method, which is applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of poor chemical stability, low density and low transparency of rare earth garnet scintillation crystal, and achieves easy doping of rare earth ions. , the effect of good chemical and photochemical stability, high melting point and radiation conversion efficiency

Active Publication Date: 2020-09-25
安徽晶宸科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Rare earth garnet scintillation crystals prepared in the prior art usually have defects such as low density, low transparency, poor chemical stability and mechanical strength.

Method used

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  • Rare earth garnet scintillation crystal and production method thereof
  • Rare earth garnet scintillation crystal and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A rare earth garnet scintillation crystal, which has the following chemical formula: Y 3 sc 2 al 3 o 12 ;

[0029] Wherein, the effective segregation coefficient of Y in the rare earth garnet scintillation crystal is 0.31, the effective segregation coefficient of Sc is 0.33, and the effective segregation coefficient of Al is 0.38.

[0030] A kind of production method of rare earth garnet scintillation crystal comprises the following steps:

[0031] S1: Weigh 1250g Y in proportion 2 o 3 , 1250g Sc 2 o 3 and 700g Al 2 o 3 , and add 75g of sintering aid, after mixing evenly, raise the temperature to 1425°C at a heating rate of 5°C / min and keep it warm for 1.25h to obtain a mixed powder;

[0032] Among them, the sintering aid is made of the following percentages of raw materials: SiO 2 The mass fraction of MgO accounts for 60%, and the mass fraction of MgO accounts for 40%;

[0033] S2: The mixed powder is made into 40mm particles, and then isostatically pressed...

Embodiment 2

[0036] A rare-earth garnet scintillation crystal with the following chemical formula: Cd 3 sc 2 Ga 3 o 12 ;

[0037] Wherein, the effective segregation coefficient of Cd in the rare earth garnet scintillation crystal is 0.3, the effective segregation coefficient of Sc is 0.33, and the effective segregation coefficient of Ga is 0.36.

[0038] A kind of production method of rare earth garnet scintillation crystal comprises the following steps:

[0039] S1: Weigh 1000g Cd in proportion 2 o 3 , 1000g Sc 2 o 3 and 500g Ga 2 o 3, and add 50g of sintering aid, after mixing evenly, raise the temperature to 1400°C at a heating rate of 5°C / min and keep it warm for 1h to obtain a mixed powder;

[0040] Among them, the sintering aid is made of the following percentages of raw materials: SiO 2 The mass fraction of MgO accounts for 55%, and the mass fraction of MgO accounts for 35%;

[0041] S2: The mixed powder is made into 35mm particles, and then isostatically pressed under a...

Embodiment 3

[0044] A rare-earth garnet scintillation crystal with the following chemical formula: Lu 3 sc 2 In 3 o 12 ;

[0045] Wherein, the effective segregation coefficient of Lu in the rare earth garnet scintillation crystal is 0.32, the effective segregation coefficient of Sc is 0.33, and the effective segregation coefficient of In is 0.4.

[0046] A kind of production method of rare earth garnet scintillation crystal comprises the following steps:

[0047] S1: Weigh 1500g Lu in proportion 2 o 3 , 1500g Sc 2 o 3 and 900g In 2 o 3 , and add 100g of sintering aid, after mixing evenly, raise the temperature to 1450°C at a heating rate of 5°C / min and keep it warm for 1.5h to obtain a mixed powder;

[0048] Among them, the sintering aid is made of the following percentages of raw materials: SiO 2 The mass fraction of MgO accounts for 65%, and the mass fraction of MgO accounts for 45%;

[0049] S2: The mixed powder is made into 45mm particles, and then isostatically pressed und...

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Abstract

The invention provides a rare earth garnet scintillation crystal and a production method thereof. The chemical formula of the rare earth garnet scintillation crystal is A3Sc2B3O12, wherein A is one selected from Y, Cd, Lu and other rare earth elements, and B is one selected from Al, Ga and In; and the effective segregation coefficient of A in the rare earth garnet scintillation crystal is 0.3-0.32, the effective segregation coefficient of Sc in the rare earth garnet scintillation crystal is 0.33, and the effective segregation coefficient of B in the rare earth garnet scintillation crystal is 0.36-0.4. The rare earth garnet scintillation crystal with the molecular formula of A3Sc2B3O12 has the excellent characteristics of high density, high effective atom coefficient, high melting point, high thermal conductivity, high hardness, low thermal expansion coefficient, high transparency, good chemical stability, high mechanical strength and the like.

Description

technical field [0001] The invention relates to the technical field of scintillation crystals, in particular to a rare earth garnet scintillation crystal and a production method thereof. Background technique [0002] Inorganic scintillation crystal materials have a wide range of applications in polymer detection, nuclear physics, and medical imaging equipment. In recent decades, the urgent need for high-resolution cleaning imaging in modern medical diagnostic techniques has stimulated research interest in scintillation materials with high density, high light output, and fast decay. Garnet originally refers to the equiaxed silicate minerals in the shape of pomegranate seeds that exist in nature, but the artificially synthesized garnet crystals are mainly silicate, and the rare earth garnet scintillation crystals are formed by doping rare earth elements in garnet crystals. , which is the material of choice for solid-state lasers. [0003] Scintillation crystals typically inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/10C01F17/32C01F17/34C30B29/28
CPCC01F17/34C01F17/32C01F17/10C30B29/28
Inventor 马孙明彭方郭玉勇窦仁勤毛炯陈仪翔张庆礼
Owner 安徽晶宸科技有限公司
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