Introduction silicon carbide SIC beam
The recrystallized Silicon Carbide SIC ceramic beam we produced is made by alpha silicon carbide powder. It is sintered under 2400 celsius after molding. SIC purity is more than 99%. It is with high strength under high temperature,the recrystallized ceramic beam is suitable for shuttle kiln. Our company have accumulated and summarized much recrystallized ceramic beam application experience according to deep research for many years. In a word,the practice application of recrystallized ceramic beams still need continuous research. We will get scientific and proper application in the sintering process of the ceiling kiln and shuttle kiln.
Reaction bonded sic beam is mainly used for load-bearing structure frame for tunnel kiln,shuttle kiln and many other kilns. Sic beam is the ideal kiln furniture for sanitary ware,domestic ceramic and other industries. We have developed a new style frame type energy-saving sic beam depending on customer usage,provide customers the better energy-saving solution. Our company has transformed hundreds of kiln cars for domestic and overseas customers,and has created large profits for our customers.
Characteristics silicon carbide ceramic beam
- High temperature resistance. It can keep natural temperature strength under high temperature,even slightly elevated. The bending strength is 80～100MPa under 20℃,and 90～110MPa under 1400℃. That’s the experiment test data, so this kind of material is more suitable for high temperature bearing parts.
- Corrosion resistance,in the acidic medium,even in high temperature acidic environment,such as boiling HCl、H2SO4、HNO3, liquated KClO3、KNO3,it can both bearing and no reaction.
- Good thermal conductivity. The thermal conductivity of recrystallized ceramic beam is 28W/m·K. It is better than alumina,oxide bonded silicon carbide,forsterite porcelain,mullite etc.So for recrystallized ceramic beam,good thermal conductivity can reduce thermal shock and improve thermal shock resistance.
- Low coefficient of thermal expansion,with an average of 4．8×10－6 /℃, it is lower than alumina porcelain,electrical porcelain,magnesia porcelain etc.
- Good oxidation resistance,and more oxidation resistance. When the component beam is working under high temperature,the surface silicon carbide is oxidized to form a SiO2 film. The film is delayed and reduced the oxidation rate,that’s compared with other non-oxide ceramics. But in fact, the recrystallized ceramic beam still has to be oxidized, and getting worse and worse. So we should clear understand that oxidation resistance is just for relative slow oxidation.
Advantages of frame type energy-saving kiln furniture sic beam:
- The weight is 30% of the traditional SIC kiln furniture
- The load density is 1.4 times as the traditional SIC kiln furniture
- The energy consumption is 30% lower than the traditional SIC kiln furniture
- The trolley speed is 40% faster than the traditional SIC kiln furniture
Technical Data Sheet of Ceramic Beam
| Item | Unit | Data |
| Max Working temperature | ℃ | 1380 |
| Density | g/cm³ | ≥3.02 |
| Porosity | % | <0.1% |
| Bending Strength | Mpa | 250(20℃) |
| Mpa | 280(1200℃) | |
| Modulus of elasticity | Gpa | 330(20℃) |
| Gpa | 300(1200℃) | |
| Thermal conductivity | W/m.k | 45(1200℃) |
| Coefficient of thermal expansion | K-1×10-6 | 4.5 |
| Rigidity | 13 | |
| Acid alkaline-proof | Excellent |
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