Sintering and crystallization of akermanite-based glass-ceramics

摘要

Akermanite-based glass-ceramics were successfully produced from the SiO_2-Al_2O_3-B_2O_3-MgO-CaO-Na_2O-F system via sintering and crystallization of glass-powder compacts at low temperatures between 750 and 800 deg C. The experimental results indicated that the amount of A1_2O_3 in the parent glass composition is seemingly a key factor with regard to the potential of this system to crystallize into a mono-mineral akermanite glass-ceramic. The aesthetics and the mechanical, the chemical and the thermal properties of the produced glass-ceramics in conjunction with the evaluation of the economic processing route proposed qualify these glass-ceramics for further investigation as potential materials suitable for applications in restorative dentistry.