Tetsuo SUNAGAWA

Preparation of Silica Glass by Pulsed Electric Current Method and Evaluation

Kazumasa MATUSHITA

Rapid heating rate and low energy consumption make Pulsed Electric Current (PEC) method useful not only for the development of ceramics but also for other materials such as glass. In this study, silica glass is prepared by this method and its properties are evaluated. Raw materials used are quartz, CVD glass, sol-gel glass.
The glass is transparent, and absorption peak 250nm was observed by Visible-UltraViolet Absorption Spectroscopy.
By fluorometric analysis, it was found fluoroscence intensity of the glass prepared from quartz was up to four times higher than that prepared by ordinary melting method. However fluoroscence intensity of the glass prepared from CVD glass or sol-gel glass is lower than that prepared by ordinary melting method, and have different peak. It is considered the fluoroscence intensity of silica glass depends on OH concentration.
The fluoroscence intensities are almost same between raw CVD silica glass and Silica glass prepared from this CVD silica glass by PEC Method.