NON FERROUS GROUP
- Releasing Agents And Lubricants For High Pressure Casting Machines
- Tablets (Alloying Additives)
- Casting Additives
- Crucibles
- Pure Metals
- Master Alloys
- Silicon Nitride (Si3N4) Thermocouple Protection Sheaths
- Silicon Carbide (SiC) Thermocouple Protection Sheaths
- Heating Elements in Silicon Carbide (SiC)
- Ceramic Foam Filters
- Ceramic Pressed Filters
- Degassing & Slagging-Off Systems and Equipment
- Brass And Steel Air Vents
- Blasting & Consumables
- Lining Systems for Aluminum & Copper Foundries
Silicon Nitride (Si3N4) Thermocouple Protection Sheaths
Silicon nitride is a high-tech ceramic material with excellent resistance to thermal shock, mechanical impact, corrosion and chemical addition.
The silicon nitride material in the liquid aluminum melt allows the measurement of heat with high precision thanks to its long life and high thermal conduction thanks to its nonadhesiveness.
| MATERIALS | With FLUX | Without FLUX |
| Cast Iron | 2 days – 1 week | ~ 1 month |
| Old Ceremics | 2 weeks – 1 month | 1 month – 2 months |
| Si3N4 | 6 months – 1 year | ~ 2 years |
| Material Properties | |
| Density | 3,2 gr/cm3 |
| Porosity | 0 % |
| Thermal Conductivity | 31 W/m.K |
| Fracture Toughness | 7 MPa m½ |
| Hardness Hv | 1450 Kg/mm2 |
| Heat Shock Resistance ∆T | ˃ 750 °C |
| Reaction againts Molten Metal | |||
| Metal | Temperature °C | Time (Hours) | Result |
| Al | 800 | 950 | Not eroded |
| Mg | 750 | 20 | Slightly eroded |
| Cu | 1.150 | 7 | Eroded |
| Zn | 550 | 500 | Not eroded |
| Sn | 300 | 144 | Not eroded |
| Pb | 400 | 144 | Not eroded |
