Structural and chemical homogeneity of chalcogenide glass prepared by melt-rocking

The chemical and structural homogeneity of selenide glasses produced by mechanical homogenization of the melt in a rocking furnace is investigated by Raman and Energy Dispersive Spectroscopy (EDS). Both techniques demonstrate that the glass is macroscopically homogeneous along the entire length of a...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of chemical physics 2019-01, Vol.150 (1), p.014505-014505
Main Authors: Lucas, Pierre, Coleman, Garrett J., Sen, Sabyasachi, Cui, Shuo, Guimond, Yann, Calvez, Laurent, Boussard-Pledel, Catherine, Bureau, Bruno, Troles, Johann
Format: Article
Language:English
Subjects:
Chemical Sciences
Diffusion coefficient
Diffusion length
Glass
Homogeneity
Homogenization
Material chemistry
Organic chemistry
Physical properties
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The chemical and structural homogeneity of selenide glasses produced by mechanical homogenization of the melt in a rocking furnace is investigated by Raman and Energy Dispersive Spectroscopy (EDS). Both techniques demonstrate that the glass is macroscopically homogeneous along the entire length of a 6 cm rod. EDS imaging performed over four orders of magnitude in scale further confirms that the glass is homogeneous down to the sub-micron scale. An estimate of the diffusion coefficient from experimental viscosity data shows that the diffusion length is far larger than the resolution of EDS and therefore confirms that the glass is homogeneous at any length scale. In order to investigate a systematic mismatch in physical properties reported in the literature for glasses produced by extended static homogenization, two germanium selenide samples are produced under the same conditions except for the homogenization step: one in a rocking furnace for 10 h and the other in a static furnace for 192 h. No difference in physical properties is found between the two glasses. The properties of an ultra-high purity glass are also found to be identical. The origin of the systematic deviation reported in the literature for germanium selenide glasses is therefore still unknown, but the present results demonstrate that homogeneity or dryness does not have a significant contribution in contrast to previous suggestions. The implications of glass homogeneity for technological applications and industrial production are discussed.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.5054704