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Divalent europium activated lithium borate scintillation glass and preparation method thereof

A technology of scintillation glass and lithium borate, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of increasing the complexity of scintillation glass preparation, unfavorable industrial production, limiting capture capacity, etc. The effect of detection efficiency, improved capture cross section, and improved efficiency

Active Publication Date: 2019-11-15
JINGGANGSHAN UNIVERSITY
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Moreover, the preparation of the above two kinds of scintillation glasses has adopted the crucible-in-a-crucible method to construct a carbon particle reducing atmosphere, which greatly increases the complexity of the scintillation glass preparation and is not conducive to industrial production.
[0005] Another example is the patent No. US2010 / 0111487A1, named "Phosphate glasses suitable for neutron detection and fibers utilizing such glasses" which discloses a 3+ Phosphate scintillation glass with ions as the luminescent center, but Li in the glass 2 O and B 2 o 3 The total content of components does not exceed 30mol%, which may limit the ability of scintillation glass to capture neutrons

Method used

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  • Divalent europium activated lithium borate scintillation glass and preparation method thereof
  • Divalent europium activated lithium borate scintillation glass and preparation method thereof
  • Divalent europium activated lithium borate scintillation glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-6

[0027] Taking Example 1 as an example to illustrate the preparation process of the scintillation glass.

[0028] Accurately weigh the glass raw material according to the specific glass composition of Example 1 in Table 1, and fully grind the glass raw material in an agate mortar for 15 minutes, then directly put it into a high-temperature electric furnace at 1050 ° C and keep it warm for 50 minutes in an air atmosphere to obtain a uniform melt . Then pour the above homogeneous melt into a stainless steel mold with a preheating temperature of 450°C for casting, and quickly place the formed glass in a muffle furnace at 450°C for 3 hours for annealing treatment. Cut into 10×10×2mm 3 The scintillation glass of the present invention is obtained after regular shape, surface grinding and polishing.

[0029] Examples 2-6 The procedure for preparing glass is the same as that of Example 1, except for the melting temperature and annealing time. With Li in the scintillation glass 2 Th...

Embodiment 7-11

[0034] The preparation process of all scintillation glasses in Examples 7-11 in Table 2 is the same.

[0035] According to the specific glass composition of Examples 7-11 shown in Table 2, the glass raw materials are accurately weighed, and after the glass raw materials are fully ground in an agate mortar for 15 minutes, they are directly placed in a 990°C high-temperature electric furnace and kept in an air atmosphere for 40 minutes to obtain homogeneous melt. Then pour the above homogeneous melt into a stainless steel mold with a preheating temperature of 380°C for casting, and quickly place the formed glass in a muffle furnace at 380°C for 3 hours for annealing treatment. Cut into 10×10×2mm 3 The scintillation glass of the present invention is obtained after regular shape, surface grinding and polishing.

[0036] Table 2. Embodiment 7-11 glass composition (mol%)

[0037] Example Li 2 o

[0038] Use the fluorescence spectrometer (Edinburgh instrument company...

Embodiment 12-16

[0040] All scintillation glasses of Examples 12-16 in Table 3 (actually, Example 12 has the same components as Example 8) have the same preparation process.

[0041] According to the specific glass composition of Examples 12-16 shown in Table 3, the glass raw materials are accurately weighed, and after fully grinding the glass raw materials in an agate mortar for 15 minutes, they are directly placed in a high-temperature electric furnace at 1000 ° C and kept warm for 40 minutes in an air atmosphere to obtain homogeneous melt. Then pour the above homogeneous melt into a stainless steel mold with a preheating temperature of 410°C for casting, and quickly place the formed glass in a muffle furnace at 410°C for 3 hours for annealing treatment. Cut into 10×10×2mm 3 The scintillation glass of the present invention is obtained after regular shape, surface grinding and polishing.

[0042] Table 3. Embodiment 12-16 glass composition (mol%)

[0043] Example Li 2 o

B ...

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Abstract

The invention discloses divalent europium activated lithium borate scintillation glass for thermal neutron detection and a preparation method thereof, and relates to the field of inorganic rare earthluminescent materials. Trivalent europium (Eu<3+>) is doped into a lithium borate glass system, and transparent divalent europium (Eu<2+>) activated lithium borate scintillation glass can be preparedin the air atmosphere after a part of B2O3 in the glass is replaced by 0.1-5 mol% of BN. The lithium borate scintillation glass body comprises the following components in percentage: 0-66.67 mol% of Li2O, 0-100 mol% of B2O3, 0-8 mol% of BN, and the balance of externally doped rare earth Eu<3+> ions. The lithium borate glass is rich in compounds such as <6>Li and (or) <10>B with large neutron capture cross sections, and neutron energy can be efficiently captured by the scintillation glass through a nuclear reaction and is transmitted to a divalent europium ion light-emitting center, so that thepurpose of neutron detection is achieved. In addition, due to inherent transparency of the glass, the preparation process is simple, the components are easy to adjust, and the characteristics of lowcost, large volume and the like can be realized, so that the scintillation glass has important application values in the fields of neutron detection, neutron flight time, petroleum logging, nondestructive inspection, neutron photography and the like.

Description

technical field [0001] The invention relates to a lithium borate scintillation glass for thermal neutron detection and a preparation method thereof, in particular to a divalent europium-activated lithium borate scintillation glass and a preparation method thereof, belonging to the field of luminescent materials. Background technique [0002] Scintillation material is a photofunctional material that converts the ionization energy of high-energy particles such as α, β, γ, or X-rays into ultraviolet / visible light. It has been widely used in fields such as safety inspection and so on. The neutron is an uncharged subatomic strong particle that does not cause ionization of matter and hardly interacts with extranuclear electrons. The current detection of neutrons is usually based on the detection of secondary particles produced by the interaction between neutrons and atomic nuclei. Therefore, in order to realize the effective detection of thermal neutron ions, the scintillation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C3/14C03B19/02C03B25/02
CPCC03C4/12C03C3/14C03B19/02C03B25/02
Inventor 孙心瑗刘秀健勒先超王文峰杨庆梅
Owner JINGGANGSHAN UNIVERSITY
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