Abstract
Aluminoborosilicate glass is an ideal substrate material in the field of flat panel display technology. The properties of aluminoborosilicate glass can be adjusted by the introduction of alkaline earth metal oxides. In this work, effects of composition on the structures and properties of aluminoborosilicate glasses are investigated, by replacing MgO with B2O3 and CaO. B and Al are mainly in the form of [BO3] and [AlO4] units in all specimens. With the replacement of MgO by B2O3, the glass network is strengthened and IVAl is transformed into VAl. Structural changes lead to the decrease in glass transition temperatures and strain points. Vickers hardness and chemical durability reach the maximum values when 2mol.% MgO is replaced by B2O3. With the replacement of MgO by CaO, VAl transforms into IVAl and IIIB transforms into IVB, leading to further increase in chemical durability, and subsequent decrease in strain point and Vickers hardness.
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