Viscous flow changes induced by illumination in selected chalcogenide and phosphate glasses detected by thermomechanical analysis
Source abstract
Abstract
The modified thermomechanical analyser, using penetration method based on the coaxial action of light and applied force, proved to be a suitable tool for the measurements of photo-viscous changes in selected chalcogenide and phosphate glasses (As 2S 3 and (PbO) 55(ZnO) 10(P 2O 5) 35 with 3.6 mol% CoO). Measurements of photo-viscous changes at temperatures close to the glass transition temperatures were performed and the highest photo-viscous changes were observed in both glasses using 650 nm wavelength. The effect of light on viscous flow was transient. The decrease in the dilatometric glass transition temperature upon illumination was also observed. The decrease of the light effect with the temperature in As 2S 3 and the independent temperature behavior in phosphate glass could be probably connected with the different nature of photo-viscous changes. In As 2S 3, a certain contribution of athermal photo-structural changes is assumed, in phosphate glass containing Co 2+ ions, only the temperature rise is considered to be the mechanism.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Phase-change materials and chalcogenides · Glass properties and applications · Mineralogy and Gemology Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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