Liquid–solid phase transition of hydrogen and deuterium in silica aerogel
Abstract
Behavior of hydrogen isotopes confined in disordered low-density nanoporous solids remains essentially unknown. Here, we use relaxation calorimetry to study freezing and melting of H2 and D2 in an ~85%-porous base-catalyzed silica aerogel. In this work, we find that liquid–solid transition temperatures of both isotopes inside the aerogel are depressed. The phase transition takes place over a wide temperature range of ~4 K and non-trivially depends on the liquid filling fraction, reflecting the broad pore size distribution in the aerogel. Undercooling is observed for both H2 and D2 confined inside the aerogel monolith. Lastly, results for H2 and D2 are extrapolated to tritium-containing hydrogens with the quantum law of corresponding states.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1409939
- Alternate Identifier(s):
- OSTI ID: 1420473
- Report Number(s):
- LLNL-JRNL-656045
Journal ID: ISSN 0021-8979
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 16; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
Citation Formats
Van Cleve, E., Worsley, M. A., and Kucheyev, S. O. Liquid–solid phase transition of hydrogen and deuterium in silica aerogel. United States: N. p., 2014.
Web. doi:10.1063/1.4900540.
Van Cleve, E., Worsley, M. A., & Kucheyev, S. O. Liquid–solid phase transition of hydrogen and deuterium in silica aerogel. United States. https://doi.org/10.1063/1.4900540
Van Cleve, E., Worsley, M. A., and Kucheyev, S. O. Thu .
"Liquid–solid phase transition of hydrogen and deuterium in silica aerogel". United States. https://doi.org/10.1063/1.4900540. https://www.osti.gov/servlets/purl/1409939.
@article{osti_1409939,
title = {Liquid–solid phase transition of hydrogen and deuterium in silica aerogel},
author = {Van Cleve, E. and Worsley, M. A. and Kucheyev, S. O.},
abstractNote = {Behavior of hydrogen isotopes confined in disordered low-density nanoporous solids remains essentially unknown. Here, we use relaxation calorimetry to study freezing and melting of H2 and D2 in an ~85%-porous base-catalyzed silica aerogel. In this work, we find that liquid–solid transition temperatures of both isotopes inside the aerogel are depressed. The phase transition takes place over a wide temperature range of ~4 K and non-trivially depends on the liquid filling fraction, reflecting the broad pore size distribution in the aerogel. Undercooling is observed for both H2 and D2 confined inside the aerogel monolith. Lastly, results for H2 and D2 are extrapolated to tritium-containing hydrogens with the quantum law of corresponding states.},
doi = {10.1063/1.4900540},
journal = {Journal of Applied Physics},
number = 16,
volume = 116,
place = {United States},
year = {Thu Oct 30 00:00:00 EDT 2014},
month = {Thu Oct 30 00:00:00 EDT 2014}
}
Web of Science
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Works referencing / citing this record:
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