Fictive effects on the structure and optical properties of densified silica glass
The optical transport properties of silica glass can be significantly improved by compressing the melt in a hot isostatic pressure (HIP) machine at high pressures and temperature. This improvement is directly related to the intrinsic properties of the network glass structure, as indicted by positron annihilation lifetime spectroscopy. We propose neutron diffraction experiments on five different silica glasses to explore the effect of (i) the fictive temperature T_f and (ii) the fictive pressure p_f on the network structure. The results will be combined with those from high-energy x-ray diffraction to construct realistic atomistic models by the molecular dynamics ¿ reverse Monte Carlo method. The network structures will be thoroughly characterised using methods that include persistence homology and cavity volume analysis. The glass structures will be used to help interpret the results obtained from positron annihilation lifetime spectroscopy, and they will be related to the optical properties of the materials as characterised by Rayleigh scattering and refractive index experiments.
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The recommended format for citing this dataset in a research publication is in the following format:
SALMON Philip Stephen; CUELLO Gabriel; GIRON LANGE Esther; Hesameddin Mohammadi and ZEIDLER Anita. (2023). Fictive effects on the structure and optical properties of densified silica glass. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-1055
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