Flicker glass of silicate activated by terbium, and preparation method

Abstract

A terbium-activated silicate scintillation glass with silicate as the matrix, wherein Tb3+ is introduced into the scintillation glass as the active ion, Gd3+ as the sensitizer, BaF2 as the flux, prepared by melting method, shaped and annealed into, wherein, the formula of the scintillation glass is (by mole percentage): SiO2 (50-80mol%); BaO (10-25mol%); BaF2 (1.2-6.0mol%); Na2O+K2O+Li2O (1 -12mol%); Al2O3 (0.1-1.2mol%); Tb2O3 (0.2-4mol%); Gd2O3 (0.2-3mol%). The preparation method of the scintillating glass includes mixing the formula evenly and melting at 1400-1450°C for 3-6 hours; pouring the molten glass into a preheated mold to shape it; Heat preservation for 3 hours and annealing treatment. The advantages are: simple process, easy adjustment of components, good chemical stability, can be drawn into optical fibers, high luminous intensity, and emission peak near 550nm, which is of great value for X-ray real-time imaging and nuclear technology applications.

Description

technical field [0001] The invention relates to terbium-activated silicate scintillation glass, which belongs to the field of luminescent materials, in particular to terbium-activated silicate scintillation glass and a preparation method thereof. Background technique [0002] Scintillation materials are photofunctional materials that emit visible light after absorbing high-energy photons. In recent years, they have been widely used in high-energy physics, nuclear physics, astrophysics, geophysics, industrial flaw detection, medical imaging, and safety testing. [0003] Scintillation crystals are currently the most studied and widely used scintillators, such as Bi 4 Ge 3 o 12 (BGO), CeF 3 , PbWO 4 Wait. However, crystal scintillators have disadvantages such as complex preparation process, long production cycle, high cost, and difficulty in producing large-size single crystals. Optimum optical performance, which greatly limits its application. And scintillation glass ha...

AI Technical Summary

Problems solved by technology

Since 2000, Tb doping has also been carried out in China. 3+ The study of silicate glasses, whose work mainly concerns Tb 2 o 3 、Gd 2 o 3 content and BaO / Cs 2 The ratio of O, and Ce ion-pair suppression to doped Tb 3+ Quantitative research on the mechanism of afterglow of silicate glass, etc., and the light yield that affects the sensitivity of X-ray imaging has not yet been well developed.

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