Optical and transport properties of dense liquid silica
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Using density-functional-theory based molecular dynamics and the Kubo-Greenwood linear response theory, we evaluated the high-pressure equation of state and the optical and transport properties of quartz and fused silica shock-compressed to 2000 GPa. Here, the computed Hugoniots and corresponding optical reflectivity values are in very good agreement with published data for quartz, and new data that we obtained on fused silica using magnetically launched flyer plate experiments. The rise of optical reflectivity upon shock compression appears to be primarily a temperature-driven mechanism, which is relatively insensitive to small density variation. We observed that the electrical conductivity does not display Drude-like frequency dependence, especially at lower temperatures. In addition, the Wiedemann-Franz relation between electrical and thermal conductivities was found to be invalid. It suggests that even at three-fold compression, warm dense liquid silica on the Hugoniot curve is still far away from the degenerate limit.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- NASA; USDOE; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; AC52-07NA27344
- OSTI ID:
- 1788340
- Alternate ID(s):
- OSTI ID: 1228630
OSTI ID: 22410443
- Report Number(s):
- LLNL-JRNL--661459; 782006
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 22; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Measurements of the sound velocity of shock-compressed liquid silica to 1100 GPa
|
journal | December 2016 |
Shock compression of fused silica: An impedance matching standard
|
journal | October 2019 |
Thermodynamically complete equation of state of MgO from true radiative shock temperature measurements on samples preheated to 1850 K
|
journal | January 2018 |
Continuous Sound Velocity Measurements along the Shock Hugoniot Curve of Quartz
|
journal | May 2018 |
Similar Records
Optical and transport properties of dense liquid silica
Asymptotic regimes for the electrical and thermal conductivities in dense plasmas
Electronic transport coefficients from ab initio simulations and application to dense liquid hydrogen
Journal Article
·
Mon Jun 15 00:00:00 EDT 2015
· Physics of Plasmas
·
OSTI ID:22410443
Asymptotic regimes for the electrical and thermal conductivities in dense plasmas
Journal Article
·
Wed Apr 15 00:00:00 EDT 2015
· Physics of Plasmas
·
OSTI ID:22408327
Electronic transport coefficients from ab initio simulations and application to dense liquid hydrogen
Journal Article
·
Wed Jun 15 00:00:00 EDT 2011
· Physical Review. B, Condensed Matter and Materials Physics
·
OSTI ID:21544784