A divalent europium-activated lithium borate scintillation glass and its preparation method

A technology of scintillation glass and lithium borate, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of limiting capture capacity, increasing the complexity of scintillation glass preparation, unfavorable industrial production, etc., and achieve enhanced capture capacity , Improve the efficiency of neutron detection, the effect of simple preparation process

Active Publication Date: 2022-05-17
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, titled "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 30 mol%, which may limit the ability of scintillation glass to capture neutrons

Method used

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  • A divalent europium-activated lithium borate scintillation glass and its preparation method
  • A divalent europium-activated lithium borate scintillation glass and its preparation method
  • A divalent europium-activated lithium borate scintillation glass and its preparation method

Examples

Experimental program
Comparison scheme
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 . Subsequently, the above-mentioned homogeneous melt was poured into a stainless steel mold with a preheating temperature of 450 °C for casting, and the formed glass was quickly placed in a muffle furnace at 450 °C for 3 hours for annealing treatment. Cut into 10×10×2 mm 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...

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. Subsequently, the above-mentioned homogeneous melt was poured into a stainless steel mold with a preheating temperature of 380 °C for casting, and the formed glass was quickly placed in a muffle furnace at 380 °C for 3 hours for annealing treatment. Cut into 10×10×2 mm 3 The scintillation glass of the present invention is obtained after regular shape, surface grinding and polishing.

[0036] Table 2. Glass compositions of Examples 7-11 (mol%)

[0037] Example Li 2 o

[0038] The photoluminescence spectr...

Embodiment 12-16

[0040] The preparation process of all scintillation glasses in Examples 12-16 in Table 3 (actually, the components of Example 12 and Example 8 are the same) is the same.

[0041] According to the specific glass composition of Examples 12-16 shown in Table 3, 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 high-temperature electric furnace at 1000 °C 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 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 10×10×2 mm 3 The scintillation glass of the present invention is obtained after regular shape, surface grinding and polishing.

[0042] Table 3. Glass compositions of Examples 12-16 (mol%)

[0043] Example L...

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Abstract

The invention discloses a divalent europium-activated lithium borate scintillation glass for thermal neutron detection and a preparation method thereof, and relates to the field of inorganic rare earth luminescent materials. The present invention will trivalent europium (Eu 3+ ) is doped into the lithium borate glass system, through the part B in the glass 2 o 3 After being replaced by 0.1‑5mol% BN, transparent divalent europium (Eu 2+ ) to activate the lithium borate scintillation glass. The components and percentages of the lithium borate scintillation glass body are respectively: Li 2 O 0‑66.67mol%, B 2 o 3 0‑100mol%, BN 0‑8mol%, the rest is externally doped rare earth Eu 3+ ion. The neutron-rich capture cross-section is larger in the invented lithium borate glass 6 Li and / or 10 Compounds such as B can efficiently capture neutron energy through nuclear reaction scintillation glass and transfer it to the divalent europium ion luminescent center, so as to achieve the purpose of neutron detection. In addition, due to the inherent transparency of glass, the preparation process is simple, the components are easy to adjust, and the characteristics of low cost and large volume can be realized, making it suitable for neutron detection, neutron time-of-flight, oil logging, non-destructive flaw detection and neutron photography. It has important application value in other fields.

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 Patents(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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