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Tailoring the gamma-ray shielding performance of zinc-tellurite glasses via metal oxide substitution.

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Title: Tailoring the gamma-ray shielding performance of zinc-tellurite glasses via metal oxide substitution.
Authors: Angulo S．, F.1 (AUTHOR), Chacaliaza-Ricaldi, J.1,2 (AUTHOR), Lozano C．, G.1,3 (AUTHOR) glozano@usp.br, Clabel H．, J.L.2 (AUTHOR), Pimenta, A.C.S.2 (AUTHOR), Mejía, B.1 (AUTHOR), Marega Jr．, E.2 (AUTHOR), Rivera, V.A.G.1,2 (AUTHOR)
Source: Journal of Non-Crystalline Solids. Dec2025, Vol. 670, pN.PAG-N.PAG. 1p.
Subjects: Radiation protection, Metallic oxides, Zinc telluride, Optical properties, Niobium oxide, Tungsten trioxide, Titanium dioxide
Abstract: Tellurite-based glasses have emerged as promising candidates due to their favorable structural and optical properties. However, their shielding performance is susceptible to compositional variations. This research investigates the incorporation of various metal oxides, specifically GeO 2 , TiO 2 , WO 3 , and Nb 2 O 5 , to enhance the shielding properties of zinc-tellurite glasses. The work aimed to elucidate the relationship between the structural features of the glasses and their functional properties, specifically optical behavior and gamma-ray attenuation performance. Such performance was evaluated computationally over a broad energy range (0.015–15 MeV) using the Geant4 toolkit and validated against XCOM data. Raman spectroscopy showed that GeO 2 promoted a more polymerized network, while Nb 2 O 5 , WO 3 , and TiO 2 increased non-bridging oxygen content, inversely affecting the optical bandgap. WO 3 -modified glass exhibited the highest density and superior shielding performance, evidenced by the highest mass attenuation coefficients and effective atomic numbers across the entire energy spectrum, alongside the lowest half-value layers and mean free paths. These findings highlight metal oxide selection as a key strategy for tailoring zinc-tellurite glasses, not only to surpass the shielding performance of conventional concrete but also to enable the design of advanced, lead-free, and transparent materials for next-generation radiation shielding and photonic devices. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Tellurite-based glasses have emerged as promising candidates due to their favorable structural and optical properties. However, their shielding performance is susceptible to compositional variations. This research investigates the incorporation of various metal oxides, specifically GeO 2 , TiO 2 , WO 3 , and Nb 2 O 5 , to enhance the shielding properties of zinc-tellurite glasses. The work aimed to elucidate the relationship between the structural features of the glasses and their functional properties, specifically optical behavior and gamma-ray attenuation performance. Such performance was evaluated computationally over a broad energy range (0.015–15 MeV) using the Geant4 toolkit and validated against XCOM data. Raman spectroscopy showed that GeO 2 promoted a more polymerized network, while Nb 2 O 5 , WO 3 , and TiO 2 increased non-bridging oxygen content, inversely affecting the optical bandgap. WO 3 -modified glass exhibited the highest density and superior shielding performance, evidenced by the highest mass attenuation coefficients and effective atomic numbers across the entire energy spectrum, alongside the lowest half-value layers and mean free paths. These findings highlight metal oxide selection as a key strategy for tailoring zinc-tellurite glasses, not only to surpass the shielding performance of conventional concrete but also to enable the design of advanced, lead-free, and transparent materials for next-generation radiation shielding and photonic devices. [ABSTRACT FROM AUTHOR]
ISSN:00223093
DOI:10.1016/j.jnoncrysol.2025.123835