Thermal and Microstructure Stability of Cordierite-Mullite Ceramics Prepared from Natural Raw Materials

摘要

In this study, attempts were undertaken to explore the possibilities to prepare cordierite-mullite composites with potentiality to be used as refractory materials from natural raw materials. Solid state reaction sintering different sample powders at different temperatures from 1,250 to 1,400 ℃ has been applied to prepare cordierite-mullite ceramics. XRD has proved the presence of cordierite and mullite in different ratios as major phases. Thermal shock test method based on heating-quenching procedure, supplemented by scanning electron microscopy and mercury intrusion porosimeter, has been used to demonstrate the thermal stability of different samples.