Neutron detection glass scintillator and preparation method and application thereof

Abstract

The invention belongs to the technical field of scintillator materials, and particularly relates to a neutron detection glass scintillator and a preparation method and application thereof. According to the neutron detection glass scintillator, the high-purity graphite crucible is adopted for high-temperature melting treatment, a powerful strong reducing atmosphere is provided for glass melting, and a glass melt can be formed only through one-time melting; meanwhile, graphite micro powder falling off from the surface of the graphite crucible can uniformly enter the whole glass melt, so that the problems that carbon powder floats on the surface of the glass melt and carbon is included in frit due to the addition of a carbon powder reducing agent are effectively avoided, the yield and the quality of the product are effectively ensured, and the glass scintillator product is relatively high in cerium element content and relatively good in stability. The color of the glass is transparent light gray, the conditions of internal stripes and bubbles are greatly improved, and the product is better in performance, higher in yield, better in batch stability and better in application performance.

Description

technical field [0001] The invention belongs to the technical field of scintillator materials, and in particular relates to a neutron detection glass scintillator and its preparation method and application. Background technique [0002] Glass scintillator is a kind of energy conversion luminescent glass material with scintillation and luminescence characteristics. Under the irradiation of various ionizing radiations such as X-rays and γ-rays and high-energy particles such as thermal neutrons, α-rays, and β-rays, it can emit ultraviolet rays. Or the light in the visible region, and can be combined with various photomultiplier tubes, charge-coupled elements and photodiodes to realize the detection, screening and quantitative analysis of various ionizing radiation and high-energy particles. Compared with other types of scintillators (such as plastic scintillators, scintillation crystals, etc.), the preparation process of glass scintillators is relatively simple, and the perform...

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Problems solved by technology

[0004] However, since Ce ions are easily oxidized to tetravalent Ce ions when they are melted under air atmosphere conditions, and thus lose their luminous ability, in order to ensure the valence state of Ce ions, a certain amount of carbon is usually added to the glass batch. pink

However, due to the extremely poor compatibility of carbon powder and glass melt, most of the carbon powder will float on the surface of the glass melt during the melting process, which leads to uncontrollable carbon powder in the glass and stable product batches Poor performance, very low yield rate, and there may be agglomerated carbon powder in the glass frit obtained by quenching, which will cause poisoning and damage to the platinum crucible. quality

It can be seen that in the production process of the traditional lithium-aluminum-silicon neutron detection glass scintillator, although the addition of carbon powder solves the problem of glass reducing atmosphere, it also brings defects such as unstable glass quality, and also loses more large proportion 6 Li and platinum crucibles, the loss of expensive raw materials or auxiliary materials increase the production cost, and the low yield rate also brings great obstacles to the actual application of the product

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