In this work, we reported new types of glass-ceramics by adding Li_2CO_3 to a borosiliate glass. The effects of the mole ratio of SiO_2/Li_2O and the thermal treatment conditions on the crystallization, microstructure and physical propertoes of the new glass-ceramics were investigated. Based on the XRD analysis, it was assumed that the mole ratio of SiO_2/Li_2O dominates the mechanism of the crystallization of the glass-ceramics. Furthermore, the crystallization mechanism of the new glass-ceramics was systematically concluded. The new glass-ceramics possessed a high TEC of about 10.4～12.8×10~(-6)/°C at 0-400 °C. A densified structure was obtained for the glass with SiO_2/Li_2O mole ratio of 1.5:1. The glass with SiO_2/Li_2O mole ratio as 2:1 displayed high flexural strength as high as 102.1MPa.
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