| Two glass compositions in Li20-Al20 3-Si02 system, one corresponding to {:1-
Spodumene, and the other corresponding to the eutectic at 1026°C were prepared, and
studied with respect to their crystallization behaviour. The phases crystallizing on
heat treatment at different temperature schedules and for different nucleating agents
were identified by X-ray diffraction patterns. In all cases, the major phase present was
Li20.Al20 3.6Si02• Besides, lithium metasilicate and lithium orthosilicate were
also crystallized. DTA technique was used to distinguish the effects of Ti02, P20 5
and Zr02 as nucleating agents. |
