Glass-ceramics were produced by crystallization of glasses in the SiO 2 –Al 2 O 3 –B 2 O 3 –MgO–CaO–Na 2 O–F system. The experimental results showed that bulk glasses are prone to surface crystallization. Hence, crystallization of bulk glasses resulted in non-homogeneous crystalline materials, which comprised relatively coarse crystals. Therefore, processing was realized using glass-powder compacts. Maximum densification was reached at 700–750°C. This interval is positioned at relatively lower temperatures than those often reported for similar sintered glass-ceramics. Doping with P 2 O 5 improved sintering behaviour and broadened sintering temperature range. Sintering between 750 and 800°C resulted in materials, which exhibited dense crystalline microstructure and the maximum flexural strength.