DOI: 10.1063/1.1515132. Viscosity of silica

Viscosity of silica

10.1063/1.1515132

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Experimental measurements of the viscosity of silica (SiO2) are critically examined; the best measurements show an activation energy of 515 kJ/mole above 1400 °C and 720 kJ/mole below this temperature. The diffusion of silicon and oxygen in silica have temperature dependencies close to that of the high temperature viscosity. Mechanisms of viscous flow and diffusion of silicon and oxygen in silica are proposed that involve motion of SiO molecules. Viscous flow is proposed to result from the motion of line defects composed of SiO molecules At temperatures below 1400 °C the fraction of SiO molecules in line defects changes with temperature. The relaxation of this fraction to an equilibrium value depends on the time. These proposed mechanisms are consistent with experimental measurements of silica viscosity.

Bibliography

Doremus, R. H. (2002). Viscosity of silica. Journal of Applied Physics, 92(12), 7619â7629.

Authors 1

Robert H. Doremus (first)

References 55 Referenced 296

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Dates

Type	When
Created	22 years, 8 months ago (Dec. 2, 2002, 1:48 p.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 2:57 p.m.)
Indexed	1 day, 10 hours ago (Aug. 28, 2025, 8:55 a.m.)
Issued	22 years, 8 months ago (Dec. 15, 2002)
Published	22 years, 8 months ago (Dec. 15, 2002)
Published Print	22 years, 8 months ago (Dec. 15, 2002)

Funders 0

None

BibTeX

@article{Doremus_2002, title={Viscosity of silica}, volume={92}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1515132}, DOI={10.1063/1.1515132}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Doremus, Robert H.}, year={2002}, month=dec, pages={7619–7629} }

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