Publikace detail

Crystallization processes in Ge2Sb2Se4Te glass

Autoři: Svoboda Roman | Bezdička Petr | Gutwirth Jan | Málek Jiří

Rok: 2015

Druh publikace: článek v odborném periodiku

Název zdroje: Materials Research Bulletin

Název nakladatele: Pergamon-Elsevier Science Ltd.

Místo vydání: Oxford

Strana od-do: 207-214

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Krystalizační procesy v Ge2Sb2Se4Te skle	Krystalizační procesy v Ge2Sb2Se4Te skle byly zkoumány pomocí technik DSC a XRD. Byl sledován vliv zrnitosti prášků na kinetiku krystalizace.	chalkogenidové sklo; krystalizace; DSC; XRD
eng	Crystallization processes in Ge2Sb2Se4Te glass	Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis were used to study crystallization in Ge2Sb2Se4Te glass under non-isothermal conditions as a function of the particle size. The crystallization kinetics was described in terms of the autocatalytic Šesták–Berggren model. An extensive discussion of all aspects of a full-scale kinetic study of a crystallization process was undertaken. Dominance of the crystallization process originating from mechanically induced strains and heterogeneities was confirmed. Substitution of Se by Te was found to enhance the manifestation of the bulk crystallization mechanisms (at the expense of surface crystallization). The XRD analysis showed significant dependence of the crystalline structural parameters on the crystallization conditions (initial particle size of the glassy grains and applied heating rate). Based on this information, a new microstructural crystallization mechanism, indistinguishable by DSC, was proposed.	chalcogenide glasses; DSC; XRD; crystallization

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