Formation of Mullite from Pyrophyllite by Mechanical and Thermal Treatments
- 1 January 1989
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 72 (1) , 154-157
- https://doi.org/10.1111/j.1151-2916.1989.tb05972.x
Abstract
When pyrophyllite is submitted to mechanical and thermal treatments, significant changes take place, according to XRD and DTA results. With grinding, the DTA endothermic peak is shifted to 540°C and becomes sharper and similar to kaolinite. A sharp exothermic peak is also produced at 1000°C, which is not present in the unground material. Increasing the mullite is associated with the formation of the latter peak. Thermal treatment causes the formation of mullite at higher temperatures.Keywords
This publication has 13 references indexed in Scilit:
- Problems in the dissolution of silicates by acid mixturesThe Analyst, 1986
- Thermal Reactions of Pyrophyllite Studied by High‐Resolution Solid‐state 27Al and 29Si Nuclear Magnetic Resonance SpectroscopyJournal of the American Ceramic Society, 1985
- On the formation of mullite from kanditesJournal of Materials Science, 1985
- Pyrophyllite Determination in Mineral MixturesClays and Clay Minerals, 1985
- Mechanism of montmorillonite structure degradation by percussive grindingClay Minerals, 1981
- The Effect of Grinding on the Structure and Behavior of BentonitesClays and Clay Minerals, 1978
- Reexamination of the Kaolinite‐to‐Mullite Reaction SeriesJournal of the American Ceramic Society, 1978
- Differential Thermal Calorimetric Determination of the Thermodynamic Properties of KaoliniteJournal of the American Ceramic Society, 1970
- Prototropy in Kaolinite During Percussive GrindingClays and Clay Minerals, 1970
- The KaoIinite‐Mullite Reaction Series: I, A Survey of Outstanding ProblemsJournal of the American Ceramic Society, 1959