Elastic Properties of 0.98Li 2 O‐1.0Al 2 O 3 ‐ n SiO 2 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 0.98Li 2 O‐1.0ALO 3 ‐ n SiO 2 glasses and the corresponding keatite solid‐solution‐phase glass‐ceramics. The SiO 2 content ranged from n =4 to 12. The magnitude of the elastic properties of the glasses changed monotonically with increasing SiO 2 content. The properties of keatite‐phase glass‐ceramics depended almost linearly on SiO 2 content, but their behavior differed qualitatively from that of the glasses.