LionGlass™: A low‐melting, carbonate‐free alternative to soda lime silicate glass

Abstract LionGlass™ is Penn State University's patent‐pending alumino‐silicophosphate glass compositional family that offers, for the first time, a viable low‐melting, carbonate‐free alternative to soda lime silicate glass by (a) lowering the melting temperature by up to 400°C compared to soda lime silicate glass and (b) eliminating the use of carbonate batch materials. The viscosity curve of LionGlass is shifted downward in temperature compared to soda lime silicate glass, enabling melting at much lower temperatures. LionGlass also has significantly improved resistance to crack initiation compared to soda lime silicate glass. Other properties, such as thermal expansion coefficient and optical dispersion curve, are comparable to those of traditional soda lime silicate glass.