Effect of Al ₂ O ₃ /SiO ₂ ratio on yttrium aluminosilicate glass: Structure, thermal, mechanical, acid resistance properties

Abstract Yttrium aluminosilicate glass with high alkali metal oxides content provides an excellent foundation for ion exchange to achieve high‐strength glass preparation. Nevertheless, poor acid resistance limits its application under extreme acidic conditions. This study investigates the effects of Al 2 O 3 /SiO 2 ratios on the structure, acid resistance, thermal, and mechanical properties of glass. Experimental results reveal that Vickers hardness, elastic modulus, glass transition temperature, and expansion softening point temperature increase with the increase of Al 2 O 3 content. Notably, there is a consistent relationship between the change in bridge oxygen ratio and the coefficient of thermal expansion. The glass network structure was optimized by adjusting the Al 2 O 3 /SiO 2 ratio, and the apparent quality of glass remained undamaged after being corroded by 6 mol/L hydrochloric acid for 6 h. In addition, the influence of network connectivity on the two‐step ion exchange efficiency was explored and the bending strength was increased to 719 MPa.