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Oxidation-accelerated crystallization of (GeS2)(y)(Sb2S3)(1-y) chalcogenide glasses
Authors: Svoboda Roman
Year: 2017
Type of publication: článek v odborném periodiku
Name of source: Journal of Non-Crystalline Solids
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 88-94
Titles:
Language Name Abstract Keywords
cze Oxidací urychlená krystalizace chalkogenidových skel (GeS2)(y)(Sb2S3)(1-y) Vliv přítomnosti kyslíku na krystalizační chování (GeS2)(y)(Sb2S3)(1-y) skel (y = 0.1 - 0.3) byl studován pomocí DSC, XRD a infračervené mikroskopie. Studie byla zpracována v závislosti na velikosti částic. Bylo zjištěno, že kyslík významně urychluje krystalizaci na mechanicky indukovaných defektech v případě skel s y = 0.1 a v případě dalších složení ovlivňuje intenzitu krystalizace. Na druhou stranu však neovlivňuje morfologii krystalů. krystalizační chování; reakční atmosféra; DSC; XRD; infračervená mikroskopie; (GeS2)(y)(Sb2S3)(1-y) skla
eng Oxidation-accelerated crystallization of (GeS2)(y)(Sb2S3)(1-y) chalcogenide glasses Influence of oxygen presence on the crystallization behavior of (GeS2)(y)(Sb2S3)(1-y) glasses (for y up to 0.3) was studied by differential scanning calorimetry, X-ray diffraction analysis and infrared microscopy - the study was performed in dependence on particle size. The oxygen was found to significantly accelerate crystallization from mechanically induced defects for the (GeS2)(0.1)(Sb2S3)(0.9) composition and to sustain the intensity of crystal formation in case of the (GeS2)(0.2)(Sb2S3)as and (GeS2)(0.3)(Sb2S3)(0.7) compositions. On the other hand, presence of oxygen influenced neither the morphology of the crystallites, nor the actual crystallization model-free and model-based kinetics. Direct microscopic observation confirmed strict surface crystallization for all studied composition. Compositional evolutions of the viscosity data and microscopically determined crystal growth rate curves have shown that it is the exceptionally high crystal growth rate and crystallization tendency (compared to the minor-to-moderate contribution of viscosity itself) that are responsible for the significant influenceability of the (GeS2)(0.1)(Sb2S3)(0.9) crystallization by the presence of oxygen. Crystallization behavior; Reaction atmosphere; DSC; XRD; Infrared microscopy; (GeS2)(y)(Sb2S3)(1-y) glasses

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