Crystallization of (GeSe2)(0.3)(Sb2Se3)(0.7) chalcogenide glass - Influence of reaction atmosphere

Show simple item record Svoboda, Roman cze 2020-03-19T12:29:31Z 2020-03-19T12:29:31Z 2019 eng
dc.identifier.issn 0022-3093 eng
dc.description.abstract Differential scanning calorimetry, infrared microscopy and X-ray diffraction analysis and were used to investigate the influence of reaction atmosphere (air versus pure nitrogen) on crystallization behavior of (GeSe2)(0.3)(Sb2Se3)(0.7) glass. The presence of oxygen was found to accelerate the crystal growth both on surface and in bulk material, with a similar effect in case of powders and bulk samples. Detailed crystallization kinetics study was performed, revealing that the presence of oxygen leads to a lowered activation energy and steeper onset of the process single-curve-averaged masterplot approach was used to deal with the temperature-differentiated complexity of the crystallization. Direct observations by infrared microscopy have shown that the presence of oxygen leads to a formation of robust surface crystalline layer, which prevents powder sintering and bulk samples deformation by viscous flow, and to a more rapid nucleation and crystal growth within the sample volume. Based on the viscosity values estimated for the crystallization temperatures, an explanation for the accelerated volume crystallization was proposed, employing the quasi-stationary conditions contributing to better cohesivity of critical nuclei and crystal/glass interface. The existence of the surface crystalline layer however prevents the sample from reaching full crystallinity. eng
dc.format p. 23-30 eng
dc.language.iso eng eng
dc.publisher Elsevier Science BV eng
dc.relation.ispartof Journal of Non-Crystalline Solids, volume 509, issue: April eng
dc.rights open access (CC BY-NC-ND 4.0) cze
dc.rights.uri *
dc.subject Crystallization kinetics eng
dc.subject Reaction atmosphere eng
dc.subject DSC eng
dc.subject XRD eng
dc.subject Infrared microscopy eng
dc.subject (GeS2)(0.3)(Sh(2)S(3))(0.7) glass eng
dc.subject krystalizace cze
dc.subject reakční atmosféra cze
dc.subject DSc cze
dc.subject XRD cze
dc.subject mikroskopie cze
dc.subject (GeSe2)(0.3)(Sb2Se3)(0.7) sklo cze
dc.title Crystallization of (GeSe2)(0.3)(Sb2Se3)(0.7) chalcogenide glass - Influence of reaction atmosphere eng
dc.title.alternative Krystalizace (GeSe2)(0.3)(Sb2Se3)(0.7) chalkogenidového skla - vliv reakční atmosféry cze
dc.type article eng
dc.description.abstract-translated Studium vlivu reakční atmosféry na krystalizační chování (GeSe2)(0.3)(Sb2Se3)(0.7) skla bylo provedeno pomocí DSC, IR mikroskopie a XRD. Bylo zjištěno, že přítomnost kyslíku v atmosféře vede k akceleraci růstu krystalů na povrchu i v objemu materiálu. podobný efekt byl pozorován u prášků i objemových skel. cze
dc.peerreviewed yes eng
dc.publicationstatus postprint eng
dc.identifier.doi 10.1016/j.jnoncrysol.2018.12.034 eng
dc.relation.publisherversion eng
dc.identifier.wos 000461531000003 eng
dc.identifier.scopus 2-s2.0-85061030176
dc.identifier.obd 39882811 eng

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open access (CC BY-NC-ND 4.0) Except where otherwise noted, this item's license is described as open access (CC BY-NC-ND 4.0)

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