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Viscous behavior of undercooled melts in (GeS2)x (Sb2S3)1-x.

Authors: Košťál Petr | Shánělová Jana | Málek Jiří

Type of publication: ostatní - přednáška nebo poster

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Language	Name	Abstract	Keywords
cze	Viskozitní chování podchlazených tavenin systému (GeS2)x (Sb2S3)1-x.	Viskozity podchlazených tavenin systému (GeS2)x (Sb2S3)1-x byly studovány penetrační metodou za pomoci termomechanického analyzátoru. Závislosti viskozity na teplotě jsou v daném intervalu popsatelné pomocí rovnice Arrheniova typu. Kinetické fragility definované Angellem jsou srovnány se změnami tepelných kapacit v oblasti skelného přechodu.	viskozita, fragilita, Ge-Sb-S
eng	Viscous behavior of undercooled melts in (GeS2)x (Sb2S3)1-x.	The measurements were made using thermomechanical analyzer TMA CX03 and spherical indenter. Viscosity of undercooled melts in system (GeS2)x(Sb2S3)1-x was determined in the range of 108 ? 1013Pa.s. The Arrhenius type of viscosity dependence was found for all measured glasses in given range of viscosity. Activation energies of viscous flow and glass transition temperatures were calculated from these dependencies. The kinetic fragilities defined by Angell were compared with changes of heat capacity in glass transition region.	viscosity, fragility, Ge-Sb-S

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