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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 >Redox relaxation in a sodium borosilicate glass doped with copper and arsenic, antimony, or tin
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Redox relaxation in a sodium borosilicate glass doped with copper and arsenic, antimony, or tin

机译：掺杂有铜和砷，锑或锡的硼硅酸钠玻璃中的氧化还原弛豫

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摘要

Glasses with the nominal chemical composition 25Na_2O? 15B_2O_3?60SiO_2 (mol%) doped with copper and arsenic, antimony, or tin as redox agents were studied by optical absorption spectroscopy in the temperature range from 25 to 620 °C. In general, the redox agents decrease the Cu~(2+)-concentration in the glasses. Increasing the temperature to 620 °C resulted in a shift of the Cu ~(2+) absorption band from 12,600 to 11,800 cm~(- 1). In glasses solely doped with copper or with copper and tin, the absorptivity decreased by about 5% in that temperature range. In principle, glasses doped with both copper and arsenic or antimony showed the same behaviour up to a temperature of 420 °C. For these glasses, heating to higher temperatures resulted in a minimum at around 540 to 500 °C and a subsequent strong re-increase in absorptivity. During cooling from 620 °C a steep decrease in absorptivity down to a temperature of 520 °C and after passing through a minimum a slight re-increase was observed. The Cu~(2+) concentration, and hence the absorptivity, after cooling depends on cooling rate (10 to 0.5 K min ~(- 1)).
机译：标称化学成分为25Na_2O的玻璃？通过光学吸收光谱法研究了在25至620°C范围内掺杂有铜和砷，锑或锡作为氧化还原剂的15B_2O_3→60SiO_2（mol％）。通常，氧化还原剂会降低玻璃中的Cu〜（2+）浓度。将温度升高到620°C导致Cu〜（2+）吸收带从12,600移至11,800 cm〜（-1）。在仅掺有铜或掺有铜和锡的玻璃中，在该温度范围内吸收率下降了约5％。原则上，掺有铜和砷或锑的玻璃在420°C的温度下仍表现出相同的行为。对于这些玻璃，加热到更高的温度会导致最低温度在540至500°C左右，并且随后吸收率会大幅增加。在从620°C冷却的过程中，吸收率急剧下降至520°C，并且在经过最小值之后，观察到轻微的重新升高。冷却后，Cu〜（2+）的浓度和吸收率取决于冷却速率（10到0.5 K min〜（-1））。

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