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

Exponential structural relaxation of a high purity silica glass

“…Recently, we reported that the memory effect was absent in high purity silica glasses while it was present in silica glasses containing high concentrations of hydroxyl or fluorine [8]. From these observations, we suggested that the memory effect or multiple relaxation times of structural relaxation originates from composition fluctuation, not from density fluctuation.…”

Fictive temperature dependence of subcritical crack growth rate of normal glass and anomalous glass

“…The fictive temperatures of the samples were measured by a simple IR method [21][22][23]. The peak wavenumber of the IR structural band near $2260 cm À1 , which is considered an overtone of the asymmetric stretching vibration of the Si-O-Si bond, was found to correlate with the fictive temperature of silica glasses [21,23] as shown in Fig.…”

Deceleration of surface structural relaxation in chlorine-containing silica glass due to chlorine volatilization

“…Both bulk and surface fictive temperatures of the glass samples were measured, before and after the second heattreatment at 950°C by using a simple IR method [5,9,10]. The peak wavenumber of the IR absorption structural band near $2260 cm À1 , m 2260 , which is considered an overtone of the asymmetric stretching vibration of the SiÀOÀSi bond, was found to correlate with the fictive temperature of silica glasses, T f , [9] as shown in Fig.…”