Proportion of alkali used in solar glass

Do aluminosilicate glasses exhibit a mixed alkali effect?

Herein, aluminosilicate (AS) glasses exhibit varying trends in Vickers hardness (HV), coefficient of thermal expansion, softening temperature (Ts) and glass transition temperature owing to the mixed alkali effect. To elucidate the mechanism of the mixed alkali effect, the glass structure was characterised using multiple methods.

How do alkali metal ions affect glass structure?

It is crucial to acknowledge that the impact of alkali metal ions on the glass structure varies due to their distinct positions within the network. Alkali metal ions that bond to the [AlO 4] tetrahedra act as charge compensators, whereas those bonded to NBOs in the network structure are termed as network modifiers.

How does a mixed alkali glass structure change over time?

For AS glasses with mixed alkali components, as the content of Li2 O replacing Na 2 O increases, the constraint strength of the glass structure below the critical temperature (Tc) gradually rises, while above Tc, it undergoes unconventional changes. These alterations lead to non-linear variations in glass properties. 1. Introduction

How do alkali metal oxides depolymerize glass?

Changes in the binding forms of oxygen atoms As discussed, Na 2 O and Li 2O, being alkali metal oxides, can capture oxygen ions from the Si–O–Si network, leading to depolymerisation of the glass network structure.