Processes are studied for synthesis of mullite from kaolin by an unusual method (by fluoride technology) in the temperature range from 850 to 1300°C. Depending on the amount of added fluorine agent it is possible to regulate the ratio of crystal phases that form (acicular mullite and lamellar corundum), that creates prerequisites for controlling preparation of aluminosilicate ceramic with a specific phase composition and a predictable microstructure.
- Heat treatment, synthesis, phase formation, mullite, topaz, corundum
- Kaolin, ammonium hydrofluoride, fluoriding
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry