Effect of Fluoride on the Reactive Crystallization ofFluoramphibole Glass-Ceramics

Abstract:

Fluoramphibole glass-ceramics were fabricated by reactive crystallization sintering the powder mixtures of crystallization promoters (fluormica) and waste glass with added LiF, NaF, MgF₂, CaF₂, BaF₂, respectively. The phase composition, microstructure and mechanical properties were investigated by means of XRD, SEM, hardness test etc methods. The results show that the excellent bonding between the fluoramphibole crystal and the glass matrix was obtained when added CaF₂, it can improve the hardness of fluoramphibole glass-ceramics. The mechanical properties of fluoramphibole glass-ceramics with single addition of fluoride were better than combined addition.

Key words:Waste glass; fluoramphibole; glass-ceramics; fluoride