Publikace detail

Investigation of barium borophosphate glasses modified with niobium oxide

Autoři: Kalenda Petr | Koudelka Ladislav | Mošner Petr | Montagne Lionel | Revel Bertrand

Rok: 2016

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Investigation of barium borophosphate glasses modified with niobium oxide	Phosphate glasses of the system BaO-Nb2O5-P2O5 were studied in two compositional series 40BaO-xNb2O5-(60-x)P2O5 (series A), with x = 0-40 mol% Nb2O5, and yBaO-20Nb2O5-(80-y)P2O5 (series B), with y = 20-60 mol% BaO. Their basic physical properties (density, molar volume, glass transition temperature, dilatometric softening temperature and thermal expansion coefficient) were determined. The index of refraction increased more steeply in glass series A with increasing Nb2O5 content than in the glass series B. In the glass series A 40BaO-xNb2O5-(60-x)P2O5 at low Nb2O5 content niobium forms isolated octahedra NbO6 incorporated in the glass network, but when Nb2O5 content increases, these octahedra are linked into chains and further into three-dimensional clusters. NbO6 octahedra clustering is reflected also in the 31P MAS NMR spectra.	barium borophosphate glasses; niobium oxide; thermal properties; Raman spectra

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