Introduction Silicon nitride refining tube components
Silicon nitride refining tube components — Silicon nitrice ceramic has the excellent corrosion resistance, the best mechanical strength and excellent thermal shock resistance. It is the most important component when being used for melting aluminum.
Silicon nitride ceramic has replaced the past metal materials increasing.
It has long lifetime and it can help customer to low production cost, raises products quality.
Characteristics Silicon nitride refining tube components
Notes:
- It should be dryed before heating the products.
- It shouldbe preheated before heating the cold kiln.
- It should be cooled and heated gradually to avoid fast cooling and heating.
- It should be handled with care to avoid beating by sharp objects.
- The end of heater must be immersed into the aluminum solution when heating. It shoud avoid dry heating.
- To avoid leaking, elastic gasket with high temperature resistance should be selected when installing the flange.
- Keep regular cleaning and maintenance can prolong the service time, otherwise, the life time will be shorter.
- When installing the degassing rotor shaft, make sure every bolt is fastened tightly so that it can avoid the bolt loose.
We can provide relevant direction of use and solution of technology and design according to customers’ demands.
Technical Data Sheet of Silicon nitride refining tube components
| Item | Unit | F-200 | F-500 |
| Bulk density | g/cm3 | 3.2 | 3.2 |
| Water absorption | % | 0 | 0 |
| Bending strength | Mpa | 750 | 800 |
| Young modulus | Gpa | 280 | 290 |
| Fracture toughness | Mpa.m1/2 | 6.5 | 7 |
| Poisson’s ratio | – | 0.28 | 0.28 |
| Vickers hardness | Gpa | 15 | 15 |
| Coefficient of linear expansion | x10-6℃ | 3.4 | 3.5 |
| Thermal conductivity | W/(m.k) | 26 | 50 |
| Specific heat | J/(g.k) | 0.65 | 0.61 |
| Volume resistivity | Ω.cm | >10^14 | >10^14 |
| Heat shock resistance | ℃ | 800 | 900 |
| Max operation temp. | ℃ | 1150 | 1150 |
