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Structural Investigation and Properties of Gallium Zinc Phosphate Glasses

Authors: Holubová Jana | Černošek Zdeněk | Černošková Eva

Year: 2016

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Structural Investigation and Properties of Gallium Zinc Phosphate Glasses	The glasses of ternary gallium zinc phosphate system have been prepared by a conventional melt-quenching method in two compositional series: xGa2O3-(50-x)ZnO- 50P2O5 (x = 0, 3, 5, 10, 13, 15, 20, 25, 30) and yGa2O3-(50-2y)ZnO-(50+y)P2O5 (y = 0, 5, 10, 15, 20, 25), the last one is a metaphosphate profile. The homogeneous glasses were prepared in the whole concentration regions. Thermal properties of glasses were studied by differential scanning calorimetry (DSC), differential thermal analysis (DTA) and thermomechanical analysis (TMA). Alloying of Ga2O3 results in increase of density, glass transition temperature, coefficient of thermal expansion and microhardness of studied glasses. The effect of successive replacement of zinc by gallium on structure has been evaluated using Raman spectroscopy, 31P MAS and static NMR. The 71Ga MAS NMR was used for quantification of gallium coordination. Chemometrical analysis, multivariate curve resolution (MCR) and corelation spectroscopy, was also used.	Structure ; Properties; Gallium Zinc Phosphate Glasses; Raman spektra; 31P NMR