Structural Relaxation in Polyanionic Sodium Fluorophosphate Glasses

Photorefraction in lead tin-fluorophosphate glasses.

Permanent grating patterns have been written directly in lead-tin-fluorophosphate glasses by use of UV radiation. The effect of photorefraction is studied in different tin-fluorophosphate compositions. Recorded gratings are found to be volume rather than surface elements. The induced index changes are comparable with those seen in GeO(2)- SiO(2) glasses.

Structural Investigation of Vanadium – Sodium Metaphosphate Glasses

The structure of the glass forming system (V2O5)x – (Na2O · P2O5)(1–x), (x = 0–0.4), has been investigated using Raman spectroscopy. The stretching vibrations of various phosphate groups, connected to phosphorus or vanadium atoms, have been assigned. Variation of the composition leads to structural changes where the sodium metaphosphate -P–O–P-chains break and then reconnect with the oxovanadiu...

Optical properties of Nd3+ ions in fluorophosphate glasses

Simple nonlinear equation for structural relaxation in glasses.

A wide range of glassy and disordered materials exhibit complex, nonexponential, structural relaxation (aging). We propose a simple nonlinear rate equation δ = a[1-exp(b δ)], where δ is the normalized deviation of a macroscopic variable from its equilibrium value, to describe glassy relaxation. Analysis of extensive experimental data shows that this equation quantitatively captures structural r...

Characterization of Structural Relaxation in Inorganic Glasses Using Length Dilatometry

................................................................................................................ ii DEDICATION............................................................................................................ vi ACKNOWLEDGEMENTS ..................................................................................... vii LIST OF TABLES ........................................