Struktura a vlastnosti fosforečnanových a borofosforečnanových skel s obsahem TEO\dindex{2} a GeO\dindex{2}

Mgr. Maryna Vorokhta

Disertační práce

Structure and properties of TeO\dindex{2} and GeO\dindex{2} containing phosphate and borophosphate glasses

Abstract:

The glasses of various compositions in ternary system Li2O-P2O5-GeO2 and quaternary systems Li2O-B2O3-P2O5-TeO2, CaO-B2O3-P2O5-TeO2, Ag2O-B2O3-P2O5-TeO2, Li2O-B2O3-P2O5-GeO2 were synthesised and studied in 7 compositional series. The basic physicochemical properties of the glasses (density, molar volume, chemical durability etc.) were investigated using different analytical methods. The structure of glasses was studied using 31P, 11B MAS NMR and Raman spectroscopy. Thermal behaviour of glasses was investigated with the differential scanning calorimetry, thermodilatometry and hot-stage microscopy. From obtained thermoanalytical curves the values of glass transition temperature, dilatation softening temperature, crystallisation temperature and thermal expansion coefficient were obtained. DSC method was used also for the study of nucleation rate and nucleation (crystallisation) mechanism of the glasses. Crystalline phases obtained by annealing of glasses were identified by X-ray diffraction analysis.

Abstract:

The glasses of various compositions in ternary system Li2O-P2O5-GeO2 and quaternary systems Li2O-B2O3-P2O5-TeO2, CaO-B2O3-P2O5-TeO2, Ag2O-B2O3-P2O5-TeO2, Li2O-B2O3-P2O5-GeO2 were synthesised and studied in 7 compositional series. The basic physicochemical properties of the glasses (density, molar volume, chemical durability etc.) were investigated using different analytical methods. The structure of glasses was studied using 31P, 11B MAS NMR and Raman spectroscopy. Thermal behaviour of glasses was investigated with the differential scanning calorimetry, thermodilatometry and hot-stage microscopy. From obtained thermoanalytical curves the values of glass transition temperature, dilatation softening temperature, crystallisation temperature and thermal expansion coefficient were obtained. DSC method was used also for the study of nucleation rate and nucleation (crystallisation) mechanism of the glasses. Crystalline phases obtained by annealing of glasses were identified by X-ray diffraction analysis.

Keywords

Phosphate glasses, Borophosphate glasses, Tellurium dioxide, Germanium dioxide, Structure, Properties, Thermal behaviour, Crystallisation

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 26. 6. 2015

Zveřejnit od: 31. 12. 2999

Obhajoba závěrečné práce

• Obhajoba proběhla 16. 9. 2015

Univerzita Pardubice

Fakulta chemicko-technologická

Doktorský studijní program / obor:
Chemistry and Technology of Materials / Chemistry and Technology of Inorganic Materials