Due to their nominal zero thermal expansion and high transparency, glass ceramics in the Li20-Al203-Si02 system found a variety of technical applications. Titania and zirconia are used as effective nucleating agents in parent glasses for heterogeneous nucleation of high-quartz solid solutions crystals. The catalyzing role of these oxides is explained by phase separation and subsequent crystallisation of ZrxTi(2-x)O4 crystals under thermal treatment.
Origin
Fraunhofer Institut, Germany
Journal Title
Proc Icg Extended Abstracts 2 2001 189-190
Sector
Glass Ceramics
Class
GC 547