Glass - Back to the Future!

Sheffield UK
4th - 8th September 2016
SGT Centenary Conference

European Society
of Glass
joins forces with
Society of
Glass Technology
to celebrate an ancient material
with a great future

Turner Legacy Symposium

Chemical Nanoheterogeneity in Glasses: Origin, Nature and Implications

article posted 04 Feb 2016

"A silicate glass might be conceived of as a sponge of silica containing silicates or their dissociation products as the filling medium."
William Ernest Stephen Turner (1925)

This highly perceptive comment by Turner at the first Symposium on the Constitution of Glass, organised by the Society of Technology in 1925, reflected the then current consensus that the structures of glasses having more than one component are chemically nanoheterogeneous. However, whereas the concept of chemical nanoheterogeneity continued to be accepted in Russia, in the West it was replaced by that of a statistically-homogeneous structure, as predicted by the random network theory, only to be readopted during the closing decades of the 20th Century.

As a result, it is not always appreciated that the presence of chemical nanoheterogeneity in single-phase glasses has extremely important consequences for modern glass science and technology, and so the objective of the present symposium (part of the SGT Centenary Conference) is to consider both the origin and nature of chemical nanoheterogeneity in the broadest sense, including its relationship to well documented phenomena, such as:

 Rui M. Almeida 
The atomic composition of silicate glass surfaces
 Austen Angell's  
New twists on the path to understanding the glass transition and the ultimate fate of supercooling liquids
 Delia S. Brauer 
The role of fluoride in the chemical nanoheterogeneity of phospho-silicate glasses
 Georges Calas 
Nanohoterogeneity in glasses: apoint of view from cations
 Reinhard Conradt 
Energentic implication of chemical nanoheterogeneity in glasses
 Wolfram Holand  
Nanophase formation in the process of nucleation and crystallisation of glass ceramics
 Himanshu Jain 
Interactions of glass with the living world: impact of nanoheterogeneity
 Lisa Klein 
Phase seperation in melting gels
 John Mauro 
Dynamical heterogeneties and relaxation in glass
 Doris Möncke 
From preferential bonding via clustering to phase-separated borosilicate glasses – a multi spectroscopic approach
 Gavin Mountjoy 
Homogeneous and inhomogeneous modifier cation distributions in oxide glases from molecular dynamics
 Bob Newport 
Probing cystallization of a fluoro-apatite - mullite system using neutron diffraction
 Carlo G Pantano 
The Heterogeneity of Glass Surfaces Revealed by Temperature Programmed Desorption
 Kathleen Richardson 
The roles of nano-scale heterogeneity fluctuations on the properties of optical composites
 Christain Russel 
Precolation, phase separation and crystallisation
 Minoru Tomozawa 
Role of Water in Silica Glass: Composition Fluctuation and Surface Stress Relaxation.
 Arun Varshneya 
Recent Advances in the Chemical Strengthening of Glass
 Natalia Vedishcheva 
The thermodyamic origin of compositional nanoheterogeneity in glasses
 Adrian Wright 
Density fluctuations in single- component glasses
 Edgar Zanotto 
The effect of nanoheterogeneities (liquid-liquid phase separation) on crystal nucleation in glass-forming silicate liquids