Synthesis of Strontium-Aluminum-Silicate Sital Using Mechanical Activation of the Batch

The effect of mechanical activation of the batch on the glassmaking process and on the uniformity of the glass obtained is examined. The object of investigation is a refractory sital glass. The mechanical activation of the batch was done by fine comminution of the glass in a planetary mill to specific surface area of the powder obtained 0.9 m 2 /g. It is shown that the silicate- and glass-formation processes in the activated batch are shifted by 50 – 150°C toward lower temperatures. The mechanically activated batch makes it possible to synthesize glass with a more uniform composition than in the case of unactivated batch; this makes it possible to obtain sital with a highly uniform glass-ceramic structure.