Vannoni M, Sordini A, Molesini G
CNR-Istituto Nazionale di Ottica, Largo E. Fermi 6, Firenze 50125, Italy.
Eur Phys J E Soft Matter. 2011 Sep;34(9):92. doi: 10.1140/epje/i2011-11092-9. Epub 2011 Sep 23.
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.
据报道，由于重力作用，熔融石英玻璃在室温下出现了长期变形的情况。进一步的实验研究现已提供了与时间相关的粘性行为的证据，其时间常数约为10年。给出了与一对熔融石英参考板相关的数据，显示了多年来发生的整体变形；还给出了关于老化相关粘度的考虑因素。根据线性粘弹性的开尔文-伏伊特模型对观察到的松弛过程进行了描述。
