Abstract
To control the SiO2/Al2O3 ratio in a starting clay material for the synthesis of β′-sialon by the carbothermal nitridation process, montmorillonite was pillared with Al2O3. Conversions to sialon of pillared clay (31% Al2O3) and reference unpillared montmorillonite (18% Al2O3) have been compared. Pillared montmorillonite yielded a mixture of β′-sialon and various oxynitrides and oxycarbides of alumina as intermediate products. Pillared clay transformed faster during annealing than structural components of smectite alone. For the proper thermal treatment and clay/carbon ratio, both pillared and unpillared clays resulted in β′-sialon solid solutions.
Original language | English (US) |
---|---|
Pages (from-to) | 4614-4618 |
Number of pages | 5 |
Journal | Journal of Materials Science |
Volume | 27 |
Issue number | 17 |
DOIs | |
State | Published - Sep 1992 |
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Science (miscellaneous)
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
- Polymers and Plastics