Kinetics of pressure relaxation in a compressed alkali borosilicate glass

authored by

L. Wondraczek, S. Krolikowski, H. Behrens

Abstract

Isothermal relaxation experiments were conducted on a mildly densified alkali borosilicate glass with an initial fictive pressure of 500 MPa. Annealing under ambient pressure at various temperatures below the glass transition leads to a gradually decreasing fictive pressure, monitored by ex situ density measurements. Relaxation times are extracted from the temporal evolution of the corresponding reaction coordinate, and an activation energy of 761 ± 40 kJ/mol is found. The timescale of pressure relaxation is similar to that of shear relaxation, but the pressure-dependence of viscosity must be considered for this assessment.

Organisation(s)

Institute of Mineralogy

External Organisation(s)

Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)

Type

Article

Journal

Journal of non-crystalline solids

Volume

356

Pages

1859-1862

No. of pages

4

ISSN

0022-3093

Publication date

01.08.2010

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Ceramics and Composites, Condensed Matter Physics, Materials Chemistry

Electronic version(s)

https://doi.org/10.1016/j.jnoncrysol.2010.06.009 (Access: Closed)