Relaxation time and viscosity of fused silica glass at room temperature

Year: 2011

Authors: Vannoni M., Sordini A., Molesini G.

Autors Affiliation: CNR – Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze

Abstract: Cases of long-term deformation of fused silica glass at room temperature attributed to the action of gravity have been reported. Further experimental investigations now provide evidence of time-dependent viscous behavior, with a time constant of the order of 10 years. Data relating to a pair of fused silica reference plates are presented, showing the overall deformation occurred over the years; considerations on the pertaining viscosity with aging are also given. An account of the observed relaxation process in terms of the Kelvin-Voigt model for linear viscoelasticity is provided.


Volume: 34 (9)      Pages from: 92  to: 92

KeyWords: Deformation; Glass; Relaxation processes; Viscosity, Experimental investigations; Kelvin Voigt model; Linear viscoelasticity; Long-term deformation; Reference plate; Room temperature; Time constants; Time-dependent, Fused silica
DOI: 10.1140/epje/i2011-11092-9

Citations: 15
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