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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Surface-luminescence from thermally reduced bismuth-doped sodium aluminosilicate glasses
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Surface-luminescence from thermally reduced bismuth-doped sodium aluminosilicate glasses

机译：热还原铋掺杂铝硅酸钠玻璃的表面发光

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摘要

We report on the effect of hydrogen annealing on the optical properties of bismuth-doped sodium aluminosilicate glasses. The redox state of bismuth in the as-melted glasses is governed by the composition, viz., NIR luminescence is observed only in the glasses with low optical basicity. Upon thermal reduction, visible emission from Bi ~(3+) and, eventually, minor amounts of Bi ~(2+) is significantly lowered, depending on heat-treatment time and temperature, and glass composition. Hydrogen treatment was also found to result in a decrease of the NIR emission intensity and, at the same time, formation of metallic bismuth particles in the surface region. Surface-tinting as well as the decrease of visible luminescence follow Arrhenian kinetics, suggesting that hydrogen permeation is the rate-governing process. Upon re-annealing in air, the effects of thermal reduction on the optical properties are reversible only to a limited extent.
机译：我们报告氢退火对铋掺杂铝硅酸钠玻璃光学性能的影响。熔化后的玻璃中铋的氧化还原状态取决于其组成，即仅在光学碱度低的玻璃中观察到NIR发光。通过热还原，取决于热处理时间和温度以及玻璃组​​成，明显降低了Bi〜（3+）的可见光发射，并最终降低了少量Bi〜（2+）的发射光。还发现氢处理导致NIR发射强度降低，并且同时在表面区域中形成金属铋颗粒。表面着色以及可见光的减少遵循Arrhenian动力学，表明氢渗透是控制速率的过程。在空气中重新退火后，热还原对光学性能的影响只能在有限的程度上逆转。

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