Publication detail

Glasses of PbO(ZnO) - Sb2O3 - P2O5 systems

Authors: Holubová Jana | Černošek Zdeněk | Rösslerová Ivana | Černošková Eva

Year: 2013

Type of publication: ostatní - článek ve sborníku

Name of source: The 23rd International Congress on Glass 2013: Book of Abstracts

Publisher name: Česká sklářská společnost

Place: Teplice

Page from-to: 262

Titles:

Language	Name	Abstract	Keywords
eng	Glasses of PbO(ZnO) - Sb2O3 - P2O5 systems	The glasses of compositional series (50-x) PbO (ZnO)-xSb2O3-50P2O5 (x = 0, 5, 10, 15, 20, 25 and 30) were prepared and their thermoanalytical properties and structure were studied by differential scanning calorimetry, thermodilatometry, Raman and UV/VIS spectroscopy. Using DSC and dilatometry it was found that glass transition temperature of these two glass-forming systems depends on the content of Sb2O3. Supercooled melt of the lead-phosphate system crystallized during heating, the crystalline phases were identified by XRD and Raman spectroscopy as Pb(PO3)2 and SbPO4. Supercooled melt of zinc phosphate glasses are thermally stable, only the melt with the highest content of antimony crystallizes partially forming SbPO4. Raman spectrum showed that the addition of antimony trioxide induces the initial depolymerization polymetaphosphate network in both systems. Measurement of UV-VIS spectra allowed estimation of the optical gap width and its compositional dependence for both glass-forming systems. This can be explained on base of supposition that localised states at the top of valence band are formed by Sb(III) non-bondig electron pair. In summary it has been found that the studied properties of the two systems are fundamentally influenced by antimony.	thermal properties; DSC; Raman spectroscopy; phosphate glasses

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