Towards obtaining the optimum physical, optical and nuclear radiation attenuation behaviours of tellurite–germanate glasses through Eu2O3 reinforcement: Glass synthesis, experimental and theoretical characterisation study

Mattos, G.R.S.; Bordon, C.D.S.; Kassab, L.R.P.; Issa, Shams A.M.; ALMisned, Ghada; Tekın, H.O.

doi:10.1016/j.ceramint.2022.09.072

Cited by 13 publications

(1 citation statement)

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“…First observed by Ivanov and Evstropiev [ 19 ], the coordination of Ge would continuously change from GeO 4 to GeO 6 with the addition of alkali oxides. Recently, the structural properties of germanate-based glasses have been examined in Na 2 O-GeO 2 -TeO 2 [ 20 ], Li 2 O-GeO 2 -TeO 2 [ 20 ], MnO-GeO 2 -PbO 2 [ 21 ], TeO 2 -GeO 2 -PbO [ 22 ], Na 2 CO 3 -CaO-GeO 2 [ 23 ], and Ga 2 O 3 -GeO 2 -BaO [ 24 ]. Among the reported germanate-based glasses, the barium gallo-germanate matrix has received the most attention due to its excellent properties, i.e., relatively large glass-forming region, high transmittance in a wide wavelength region, superior chemical durability, and thermal stability [ 25 , 26 ].…”

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confidence: 99%

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

et al. 2023

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Modified barium gallo-germanate glass hosts are still worthy of attention in studying structure–property relationships. In this work, two different series of glass systems based on (60-x)GeO2-xTiO2-30BaO-10Ga2O3 and (60-x)GeO2-xB2O3-30BaO-10Ga2O3 (x = 10, 30, 50 mol%) were synthesized, and their properties were studied using spectroscopic techniques. X-ray diffraction (XRD) patterns revealed that all fabricated glasses were fully amorphous material. The absorption edge shifted toward the longer wavelengths with a gradual substitution of GeO2. The spectroscopic assignments of titanium ions were performed with excitation and emission spectra compared to the additional sample containing an extremely low content of TiO2 (0.005 mol%). On the basis of Raman and FT-IR investigations, it was found that increasing the TiO2 content caused a destructive effect on the GeO4 and GeO6 structural units. The Raman spectra of a sample containing a predominantly TiO2 (50 mol%) proved that the band was located near 650 cm−1, which corresponded to the stretching vibration of Ti-O in TiO6 unit. The deconvoluted IR results showed that the germanate glass network consisted of the coexistence of two BO3 and BO4 structural groups. Based on the experimental investigations, we concluded that the developed materials are a promising candidate for use as novel glass host matrices for doping rare-earth and/or transition metal ions.

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