Medium range order and structural relaxation in As–Se network glasses through FSDP analysis
- Austin Peay State Univ., Clarksville, TN (United States). Dept. of Physics and Astronomy
- Univ. of Arizona, Tucson, AZ (United States). Dept. of Materials Science and Engineering
- Lehigh Univ., Bethlehem, PA (United States). Dept. of Materials Science and Engineering
- Jan Dlugosz Univ. of Czestochowa (Poland). Inst. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
We performed synchrotron X-ray diffraction and neutron scattering studies on As-Se glasses in two states: as-prepared (rejuvenated) and aged for similar to 27 years. The first sharp diffraction peak (FSDP) obtained from the structure factor data as a function of composition and temperature indicates that the cooperative processes that are responsible for structural relaxation do not affect FSDP. The results are correlated with the composition dependence of the complex heat capacity of the glasses and concentration of different structural fragments in the glass network. Furthermore, the comparison of structural information shows that density fluctuations, which were thought previously to have a significant contribution to FSDP, have much smaller effect than the cation-cation correlations, presence of ordered structural fragments or cage molecules.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357
- OSTI ID:
- 1334441
- Alternate ID(s):
- OSTI ID: 1247752
- Journal Information:
- Materials Chemistry and Physics, Vol. 153, Issue C; ISSN 0254-0584
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Effect of high‐energy mechanical milling on the medium‐range ordering in glassy As‐Se
|
journal | October 2019 |
Similar Records
Intermediate-range order in binary chalcogenide glasses: The first sharp diffraction peak
Extended-range order in glasses