Uses
Ferrosilicon nitride NITRO-FESIL® N30 is new material, which designed as component for refractory production, mainly as a strengthener in tap hole muds and runner clays. NITRO-FESIL® N30 is produced by SHS-technology (combustion synthesis) and has unique combination of service properties.
Description
Ferrosilicon nitride NITRO-FESIL® N30 is composition material based on beta-silicon nitride (β-Si3N4). It is synthesized in special reactors under pressure 10 MPa and temperature about 2000 °C. Because of a high combustion temperature, α-silicon nitride is not formed.
NITRO-FESIL® N30 is obtained by nitriding of mixture of high grade ferrosilicon alloys and metallic silicon. Ferrosilicon nitride NITRO-FESIL® N30 differs from the traditional «furnace» ferrosilicon nitride in special composition structure based on β-Si3N4.
| Mass fraction, % | Phase | ||||
|---|---|---|---|---|---|
| Si3N4 | Si | N | Fe | O | β-Si3N4: 90 min α-Si3N4: 10 max |
| 75 min | 51 min | 30 min | 15 max | 1,5 max | |
| Typical composition | |||||
| 78 | 53 | 31 | 12 | 1,0 | |
Ferrosilicon nitride as a
Other refractory materials