E. Demirkesen et al., Effect of Al2O3 additions on the thermal expansion behavior of a Li2O-ZnO-SiO2 glass-ceramic, J AM CERAM, 82(12), 1999, pp. 3619-3621
The effect of Al2O3 substitution on the thermal expansion behavior of a Li2
O-ZnO-SiO2 glass-ceramic was investigated using differential thermal analys
is, X-ray diffractometry, and dilatometry. The coefficient of thermal expan
sion of the original Al2O3-free glass-ceramic measured between 20 degrees a
nd 900 degrees C decreased from 12.4 x 10(-6)degrees C-1 to 6.3 x 10(-6)deg
rees C-1 with Al2O3 substitution for ZnO up to 11 wt%. The results were cor
related to the changes in the phase assemblage with Al2O3 addition.