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Vitreous GeO2 response to shock loading

Liu, C. and Ahrens, Thomas J. and Brar, N. S. (2000) Vitreous GeO2 response to shock loading. In: Shock compression of condensed matter--1999 : proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter held at Snowbird, Utah, June 27-July 2, 1999. American Institute of Physics Conference Proceedings. No.505. American Institute of Physics , Melville, NY, pp. 275-278. ISBN 1-56396-923-8.

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Shock wave profiles in vitreous GeO2 (6.56 Mg/m^3) under planar loading were measured using stress gauges to 14 GPa. New and previous data yield Hugoniot: D=0.974 (km/s)+1.711 u for shocks of 6 to 40 GPa. We show that the phase change from 4- to 6-fold coordination of Ge+4 with O–2 in vitreous GeO2 occurs from 4 to 15 GPa. Hugoniots of vitreous GeO2 and SiO2 are found to approximately coincide if the pressure in SiO2 is scaled by the ratio of SiO2 to GeO2 initial density.

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Additional Information:© 2000 American Institute of Physics. This work was supported by Army Research Office and NASA. Contribution number 8663, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125.
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Subject Keywords:glass transition; solid-state phase transformations; vitreous state; germanium compounds; oxygen compounds; equations of state; thermodynamics; shock wave effects; high-pressure effects; acoustic wave velocity measurement
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Caltech Division of Geological and Planetary Sciences8663
Series Name:American Institute of Physics Conference Proceedings
Issue or Number:505
Record Number:CaltechAUTHORS:LIUaipcp00b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5914
Deposited By: Archive Administrator
Deposited On:08 Nov 2006
Last Modified:08 Nov 2021 20:29

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