Synthesis, characterization and optical properties of non-traditional tellurite–selenite glasses

• Glasses containing SeO2, TeO2, MoO3 and V2O5 were obtained.
• The real chemical composition was verified by LA-ICP-MS.
• By IR and X-ray photoelectron spectroscopy was determined the main building units.
• It was found that mixed bridging bonds only build up the amorphous network.
• By UV–Vis was established that the glasses are transparent above 550 nm.

This study continues our investigations on non-traditional tellurite–selenite amorphous materials. Two glasses containing TeO2, SeO2, MoO3 and V2O5 were obtained at high oxygen pressure (P = 36 MPa) using pure oxides as precursors. The real bulk chemical composition of both glasses was verified by LA-ICP-MS method. The glasses were characterized by X-ray diffraction, Scanning Electron Microscopy (SEM), Differential Thermal Analysis (DTA), UV–Vis, XPS, IR and EPR spectroscopy. According to DTA the glass transition temperature (Tg) is below 300 °C. Both glasses were subjected to heat treatment (300 °C – 12 h) and as a result no crystallization was observed. The main building units (TeO3, TeO4, Mo2O8, and SеО3) were determined by IR and X-ray photoelectron spectroscopy and the existence of mixed bridging bonds only, which build up the amorphous network. It was established by UV–Vis that the obtained glasses are transparent above 550 nm and they were red colored.

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