Relaxation time and viscosity of fused silica glass at room temperature

  title={Relaxation time and viscosity of fused silica glass at room temperature},
  author={Maurizio Vannoni and Andrea Sordini and Giuseppe Molesini},
  journal={The European Physical Journal E},
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… 
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