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Thermal properties and structure of (As2S3)100-X(Sb4S4)X glassy system
Autoři: Holubová Jana | Černošek Zdeněk | Černošková Eva | Chromčíková Mária | Liška Marek
Rok: 2013
Druh publikace: článek ve sborníku
Název zdroje: Book of Contributions - 4th Joint Czech-Hungarian-Polish-Slovak Thermoanalytical Conference
Název nakladatele: Univerzita Pardubice
Místo vydání: Pardubice
Strana od-do: 132-135
Tituly:
Jazyk Název Abstrakt Klíčová slova
cze Termické vlastnosti a struktura skel systému (As2S3)100-X(Sb4S4)X Termické vlastnosti a struktura skel systému (As2S3)100-X(Sb4S4)X byly studovány diferenční skenovací kalorimetrií a ramanovou spektroskopií. Bylo zjištěno, že se zvyšujícím se obsahem antimonu mohou být skla rozdělena do tř skupin. skelný přechod; Ramanova spektroskopie; sklovitý systém As-Sb-S
eng Thermal properties and structure of (As2S3)100-X(Sb4S4)X glassy system Thermal properties and structure of bulk glasses of (As2S3)1-x(Sb4S4)x system (x varies from 0 up to 60) were studied by differential scanning calorimetry and Raman spectroscopy. It was found that with increasing Sb content the glasses can be sorted out to the three groups. The structure of glasses with x < 10 is build up mainly from AsS3/2 units and the well known crystallization resistance of As2S3 can explain the reluctance of these supercooled liquids against crystallization. In glasses with a higher content of antimony 10 < x < 30, the vibration characteristics of As4S4 clusters appear. Supercooled melts of these glasses crystallize to form ?-As4S4 and high-temperature phase of Sb2S3. Properties of glasses with the highest antimony content are preferably determined by SbS3/2 structural units and Sb2S3 crystallizes from their undercooled melts. Set of Raman spectra were analyzed by chemometric methods. Using Principal component analysis (PCA) and Multivariate curve resolution (MCR) four independent components and their Raman spectra were identified. Shape analysis of Raman spectra by Cluster analysis divided the spectra into three groups with excellent agreement with thermal analysis findings. glass transition; Raman spectroscopy, As-Sb-S glassy system

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