Crystallization kinetics of fluoride nanocrystals in oxyfluoride glasses

► Oxyfluoride glasses containing CaF2, SrF2, and BaF2 were prepared, respectively. ► Their crystallization behavior was analyzed using non-isothermal kinetics. ► The glass containing CaF2 showed the fastest kinetics for CaF2 crystallization. ► Three glasses showed very close behavior for glass matrix crystallization. ► Crystallization kinetics varies by ionic size and ionic bond strength.