Abstract
The fly ash with high calcia content (Lagisza power station) has been chosen for the present study. Possible nitrogen for oxygen substitution was estimated on the base of the Si:Al ratio or Ca:Si:Al ratio in fly ash and necessary carbon amount was calculated from the stoichiometric reaction. Fly ash with addition of clay and carbon was reacted at 1520°C. After sintering at 1350-1450°C XRD, EDS and SEM examinations were applied to the specimens sintered with yttria addition. It has been found that phase composition of the carbothermal reduction product depended on the amount of carbon and resulted in β- or α/β-sialons besides 15R and 12H phases. Subsequent sintering involved changes of the phase composition, dissolution of Ca-α-sialon and crystallization of YAG or secondary β-sialon, depending on temperature of sintering.
| Original language | English |
|---|---|
| Pages (from-to) | 1005-1008 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 264-268 |
| Issue number | II |
| Publication status | Published - 2004 |
| Event | Proceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey Duration: 29 Jun 2003 → 3 Jul 2003 |
Keywords
- Ca-α-sialon
- Fly ash
- Microstructure
- Phase composition
- β-sialon
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
Fingerprint
Dive into the research topics of 'Influence of process parameters on the phase composition of SIAION ceramics from polish fly ash'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver