The magnesium oxide can effective control the setting rate and crystallization behaviour of glass metal. The main is the glass’ physical performance at high temperature. At the same time, it can improve the melting properties of glass. In other words, it plays a role of fluxing action.
In order to meet the need for high speed molding, the magnesium oxide can control the rate of hardening.
During the cooling process, the glass metal maybe becomes crystal or explode when annealing. In order to prevent it, the magnesium oxide used for glass can control the crystallization behaviour.