Analysis of unconventional boron-aluminum anomaly induced by mixed alkaline earth effect in glass substrate

In this paper, the alkali-free aluminoborosilicate glass substrate was successfully prepared by the traditional melt quenching method, and the effect of boron oxide replacing alumina on the structure and properties of glass substrate was studied. DSC, FTIR and XPS results were used to analyze the physical-chemical properties and thermal properties of the materials in detail. The results show that when boron oxide replaces alumina to 8 wt%, unconventional boron-aluminum anomaly (aluminum oxide tetrahedron was increased to 97.67%, and the boroxy tetrahedron appeared with a relative content of boroxide triangulation of 21.14%) leads to a more stable structure of glass network and extreme performance. This phenomenon is caused by the mixed alkaline earth effect resulting from the change in the ratio of alkaline earth metal oxides. In this study, most of the properties of glass have met industrial standards, and the theoretical analysis has reference significance for industrial production. [Display omitted] •Unconventional boron aluminum anomaly phenomenon caused by mixed alkaline earth effect was found.•Under the mixed alkaline earth effect, the performance of glass substrate is significantly improved.•The changes of glass structure were analyzed in detail with FTIR and XPS.•A matching glass network structure model is established.•The structural changes caused by mixed alkaline earth effect are described in detail.