The effects of the addition of ZrSiO4 to 30Li(2)O/70SiO(2) powdered glass on its crystallization behaviour were investigated by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Transparent glasses with a ZrSiO4 content of up to 10.30 mol% were obtained. Li2Si2O5 and/or ZrSiO4, Li2Si2O5 and tridymite were crystallized after appropriate heat treatments. Kinetics parameters for surface crystallization were estimated from the DTA curves. The crystallization was completed in the 590-907 degrees C temperature range for activation energy values between 460.5 and 715.9 kJ mol(-1). The resulting materials are potential candidates for useful sintered glass-ceramics with a wide number of applications.