Ultrasonic Microspectroscopy Measurement of Fictive Temperature for Synthetic Silica Glass

Experimental procedures to evaluate the fictive temperature (TF) of synthetic silica glass were developed using ultrasonic microspectroscopy (UMS) technology by measuring longitudinal-wave velocity (Vl). Two kinds of commercial synthetic silica glass (without and with water) were demonstrated, resulting in the establishment of calibration lines between Vl and TF with a resolution within 1 °C and clear observation of their hydroxyl (OH) dependences. This ultrasonic method and system will be extremely useful and effective for improving mass-production conditions of glass ingots as well as for conducting basic studies on glass science.