ガラス転移温度よりはるかに低い温度におけるガラスの緩和と遅延弾性

概要

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Deformations of pre-annealed lead-silicate glass fibers were measured by the fiber-bending method during loading and unloading below the glass transition temperature. Burger model consisting of Maxwell and Voigt elements was used for the evaluation of elasticity, delayed elasticity and viscosity. In the loading process, it was found that the deformation due to the viscosity increases with time. However, the deformation due to the delayed elasticity increases rapidly for a short time and decreases with further increase in time. In the temperature range of the measurement, the viscosity of Maxwell element, representing pure viscosity decreases with increasing temperature. The viscosity of Voigt element consisting of the delayed elasticity decreases with increasing temperature and is one magnitude order lower than that of Maxwell element. The elastic constant of Voigt element consisting of the delayed elasticity decreases slightly with increasing temperature. In the unloading process, the delayed elasticity was analyzed, assuming that the elasticity of Voigt element is the same as that in the loading process.
社団法人日本セラミックス協会の論文
1998-03-01