Network Structure and Properties of Lithium Aluminosilicate Glass

Based on lithium aluminosilicate glass, the composition of glass was optimized by replacing SiO(2) with B(2)O(3), and the influence of glass composition on structure and performance was studied. With the increase in B(2)O(3) concentrations from 0 to 6.5 mol%, Al(2)O(3) always existed in the form of four-coordinated [AlO(4)] in the network structure, and B(2)O(3) mainly entered the network in the form of four-coordinated [BO(4)]. The content of Si-O-Si linkages (Q(4)((0Al))) was always dominant. The incorporation of boron oxide improved the overall degree of polymerization and connectivity of the lithium aluminosilicate glass network structure. An increase in the degree of network polymerization led to a decrease in the thermal expansion coefficient of the glass and an increase in Vickers hardness and density. The durability of the glass in hydrofluoric acid and NaOH and KOH solutions was enhanced overall.