STRUCTURE OF SODIUM ALUMINOSILICATE GLASSES : T1 LUMINESCENCE SPECTROSCOPY

Structure of Rare-Earth Aluminosilicate Glasses Probed by Solid-State NMR Spectroscopy and Quantum Chemical Calculations

Results presented in this thesis are based on the following publications, which are referred to by the corresponding roman numbers I-IV: Reprints were made with the permission from the publishers.

Luminescence Properties of TeO2-LiF-Gd2O3 Glasses

In this work, the structural properties and spectroscopic behavior 80 mol.%TeO2-20mol.%LiF glasses which were doped with 0. 05, 0. 2 mole% Gd2O3 have been studied. It was shown that,  by increasing the amount of Gd2O3 the glass stability was decreased. The PL emissions at 431nm and 627nm wavelengths were distinguished by 320nm excitation. The FT-IR analysis showed deformed TeO4 groups in these ...

27Al NMR study of the structure of lanthanum- and yttrium-based aluminosilicate glasses and melts.

We have investigated by (27)Al nuclear magnetic resonance spectroscopy some compositions in the Ln(2)O(3)-Al(2)O(3)-SiO2 (Ln = Y or La) ternary phase diagram containing more than 60 mol % of SiO2. One- and two-dimensional high-field (17.6 T) high-speed (30 kHz) magic angle spinning experiments have been performed along with simulations of the spectra to quantify the amount of penta-coordinated ...

The distribution of sodium ions in aluminosilicate glasses: A high-field Na-23 MAS and 3Q MAS NMR study

The local configurations around sodium ions in silicate glasses and melts and their distributions have strong implications for the dynamic and static properties of melts and thus may play important roles in magmatic processes. The quantification of distributions among charge-balancing cations, including Na in aluminosilicate glasses and melts, however, remains a difficult problem that is releva...

Sodium Aluminosilicate Fouling and Cleaning of Decontaminated Salt Solution Coalescers