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Adequacy test of the fictive temperatures of silica glasses determined by IR spectroscopy

“…But silica glass and boria glass behave quite differently. For example, B 2 O 3 glass exhibits a peculiar temperature dependence of light scattering intensity; the scattered intensity exhibits a maximum intensity near the glass transition temperature only during heating but not during cooling [23]. Moynihan and Schroeder explained this light scattering anomaly by postulating the existence of different regions with different relaxation times produced by density fluctuation [19].…”

Non-equilibrium fluctuations as a plausible reason of the light scattered intensity peak in the glass transition region

“…At the same time, it is evident that the study of the anomalous behavior of the scattered intensity is extremely important and allows obtaining new information on the processes taking place in the glass transition region. It was shown [5] that the appearance of the scattered intensity maximum was accompanied by the diffraction of the primary laser beam passing through the sample.…”

“…The first steps in this direction were carried out in [8][9][10][11], where the influence of the thermal prehistory on the scattered intensity after temperature jumps in the glass transition region of germanate, phosphate and silicate glasses was observed. It was found that the time dependence intensity after the temperature jump from low-temperature to larger value exhibited the universal character, which manifested itself as a peak.…”

Memory effect in the glass transition region of silicate glass based on light scattering data

“…Recently it was found that after temperature jumps time dependence of the integral light scattered intensity demonstrated the universal character, which manifested itself as a maximum in the glass transition region [8][9][10][11][12]. It was shown at least for the oxide glass that the maximum height and its location were depended on the thermal prehistory of a glass.…”

“…A step on the way to the solution of this problem was made in the previous work [8][9][10], in which by means of method up-jumps from stabilization temperature T st to observation temperature T obs the influence of thermal history of the phosphate glass was studied. It was found that the dependences of the maximum height and its location from the stabilization time t st at T st followed the exponential equation.…”