Elastic Properties of 0.98Li2O-1.0Al2O3-nSiO2 Glasses and Keatite-Phase Glass-Ceramics

Bulk physical properties such as elastic moduli, thermal expansions, and moduli of rupture were measured for a series of 0.98Li₂O-1.0ALO₃- n SiO₂ glasses and the corresponding keatite solid-solution-phase glass-ceramics. The SiO₂ content ranged from n =4 to 12. The magnitude of the elastic properties of the glasses changed monotonically with increasing SiO₂ content. The properties of keatite-phase glass-ceramics depended almost linearly on SiO₂ content, but their behavior differed qualitatively from that of the glasses.