Crystallization Kinetics of Lithia‐Silica Glasses: Effect of Composition and Nucleating Agent

The kinetics of crystallization of a 25Li 2 O · 75SiO 2 (wt%) glass doped with Pt, Cu, Au, TiO 2 , and P 2 O 5 were studied using nonisothermal techniques. The activation energy, E , and the frequency factor, v , for the overall crystallization process depended directly on the critical cooling rate for the glass formation, R c , of these glasses. The crystallization kinetics of several other glasses in the lithia‐silica system were also studied as a function of composition, critical cooling rate, and liquidus temperature, T m . E and v for these glasses were more dependent on the liquidus temperature than on R c .