Univerzita Pardubice Fakulta chemicko- technologická

Univerzita Pardubice

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Publikace detail

Structural analysis of lithium-niobium borophosphate glasses by 1/2D MAS NMR techniques

Autoři: Hostinský Tomáš | Koudelka Ladislav | Mošner Petr | Tricot Grégory

Rok: 2024

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Structural analysis of lithium-niobium borophosphate glasses by 1/2D MAS NMR techniques	Borophosphate glasses of the series (100-x)[0.4Li2O-0.2Nb2O5-0.4P2O5]-xB2O3 were studied in a composition range of x = 0-48 mol% B2O3. Basic physical properties were determined, and thermal properties studied by differential thermal analysis, thermomechanical analysis. The glass structure was investigated using Raman spectroscopy and 11B and 31P MAS NMR. The electrical properties of the glasses were obtained by using impedance spectroscopy. Focus of this contribution will be given on MAS NMR analysis of studied glasses. Structure of the glasses was probed with multiple MAS NMR experiments. To get first information about the glass structure, standard 1D experiments of 11B and 31P nuclei were performed. To probe interconnections between phosphate and borate species was further studied by 2D correlation techniques. Namely 11B(31P) D-HMQC sequence to investigate P–O–B connections. By combining all these methods, we were able to prepare an approximate structural model of these glasses, which could be used to explain the macroscopic properties of the studied glasses.