First-class divalent europium activated orthosilicate flickering luminescent material and its preparation method and application in X ray detection

A scintillation luminescence, orthosilicate technology, used in luminescent materials, radiation intensity measurement, chemical instruments and methods, etc., can solve the problem that the radiative luminescence properties are rarely concerned, and achieve large-scale industrial applications with broad prospects and low cost. , the effect of enhancing the light output intensity

Inactive Publication Date: 2017-10-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(CN102899037 B; US7642708 B2) However, little attention has been paid to its radioluminescent properties

Method used

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  • First-class divalent europium activated orthosilicate flickering luminescent material and its preparation method and application in X ray detection

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh barium carbonate (BaCO 3 ) 1.1837 g, silicon dioxide (SiO 2 ) 0.1802 g, europium oxide (Eu 2 o 3 ) 0.0003 g was placed in an agate mortar and ground for 20 min, mixed evenly, and then put into a corundum crucible, which was put into a horizontal tube furnace and heated in 10% H 2 / 90%N 2The high-temperature roasting reaction in a reducing atmosphere, the specific heating procedure is as follows: it takes 5 hours to raise the temperature from room temperature to 1400° C., keep the temperature for 5 hours, and then naturally cool to room temperature. The sample is taken out and ground to obtain the product, and its chemical composition expression is: Ba 1.9995 Eu 0.0005 SiO 4 .

Embodiment 2

[0033] Weigh barium carbonate (BaCO 3 ) 0.8877 g, strontium carbonate (SrCO 3 ) 0.2214 g, silicon dioxide (SiO 2 ) 0.1802 g, europium oxide (Eu 2 o 3 ) 0.0003 g was placed in an agate mortar and ground for 20 min, mixed evenly, and then put into a corundum crucible, which was put into a horizontal tube furnace and heated in 10% H 2 / 90%N 2 The high-temperature roasting reaction in a reducing atmosphere, the specific heating procedure is as follows: it takes 5 hours to raise the temperature from room temperature to 1400° C., keep the temperature for 5 hours, and then naturally cool to room temperature. The sample is taken out and ground to obtain the product, and its chemical composition expression is: Ba 1.4995 Sr 0.5 Eu 0.0005 SiO 4 .

Embodiment 3

[0035] Weigh barium carbonate (BaCO 3 ) 0.5917 g, strontium carbonate (SrCO 3 ) 0.4429 g, silicon dioxide (SiO 2 ) 0.1802 g, europium oxide (Eu 2 o 3 ) 0.0003 g was placed in an agate mortar and ground for 20 min, mixed evenly, and then put into a corundum crucible, which was put into a horizontal tube furnace and heated in 10% H 2 / 90%N 2 The high-temperature roasting reaction in a reducing atmosphere, the specific heating procedure is as follows: it takes 5 hours to raise the temperature from room temperature to 1400° C., keep the temperature for 5 hours, and then naturally cool to room temperature. The sample is taken out and ground to obtain the product, and its chemical composition expression is: Ba 0.9995 SrEu 0.0005 SiO 4 .

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Abstract

The invention discloses a first-class divalent europium activated orthosilicate flickering luminescent material and its preparation method and application in X ray detection. The chemical constitution expression formula is Ba<2 x y>SrxEuySiO4; where a and y are amount of barium ions Ba<2+> in the doped ions Sr<2+> and Eu<2+> substituted matrixes; the value scale is x is not more than 1.9 and not less than 0, and y is more than 0 and not more than 0.01. The matrix of the flickering luminescent material is a series of isostructural orthosilicate Ba<2 x>SrxSiO4; the lighting center is divalent rare-earth europium ion Eu<2+>. The flickering luminescent material is compounded by a high temperature solid state method; the preparation technique is simple, the operation is safe and the condition is easy to control. In view of high radiation light output of the flickering luminescent material, good chemical stability and fast fluorescence decay, the first-class divalent europium activated orthosilicate flickering luminescent material is expected to be the novel flickering luminescent material for detecting X ray radiation.

Description

technical field [0001] The invention belongs to the field of scintillation luminescence materials and high-energy X-ray detection. More specifically, a class of divalent europium-activated orthosilicate Ba 2-x-y Sr x Eu y SiO 4 Preparation of scintillating luminescent materials and their application in X-ray detection. Background technique [0002] Scintillation materials refer to: a class of materials that can convert these particles into optical signals after being irradiated by high-energy particles (including uncharged particles such as X-rays, γ-rays and charged particles such as α-particles and β-particles). People have studied scintillation materials for more than 100 years, and they are widely used in high-energy physics, safety inspection, geological survey, environmental monitoring, nuclear medical imaging and other fields, and are one of the core materials in many technical fields. Scintillation luminescent materials require high radiant light output, fast lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59G01T1/20
CPCC09K11/7734G01T1/20
Inventor 梁宏斌林利添周容富
Owner SUN YAT SEN UNIV
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