Processing and Characterization of Nanocrystalline Mica Glass-Ceramics

In order to fabrication of transparent glass-ceramics with li-mica nano crystals, the glasses with chemical composition of 94.9 mass% li(i+x)mg3alsi3(i+x)f2 (x=0.5) with 5.1 mass% mgf2 were crystallized. the glasses were fabricated via the conventional melt-quenching technique. mica crystals were precipitated in the glass phase by later heat treatment. glass samples had glass transition temperature (tg), 557 °c, softening temperature (ts), 603 °c, and crystallization peak temperature (tp), 655 °c. the fine mica crystals with size of < 50 nm were precipitated at 600 °c in one continuous glass phase of the binodal phase separation. it's confirmed that both as-quenched and heat-treated samples are transparent in the visible wave length.