Transformation Mechanism of Fluormica to Fluoramphibole in Fluoramphibole Glass Ceramics

Figure 4

Microstructures of glass ceramic samples isothermally heated at 820°C with (a) 0 h, (b) 10 min, (c) 0.5 h, (d) 1 h, (e) 2 h, and (f) 4 h.