Silicon Carbide Raw Materials
Silicon carbide raw materials
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The pressure free sintered silicon carbide has the following characteristics::1.High thermal conductivity:
- The thermal conductivity of the pressure free sintered silicon carbide is much higher than other corrosion resistant materials
- The pressure free sintered silicon carbide occupies a smaller heat transfer area with the same heat exchange efficiency
- This material allows for a smaller heat exchanger size
- The pressure free sintered silicon carbide significantly reduces occupied space, which saves money.
2. Anti-corrosion:
- This material features a high corrosion, oxidation and erosion resistance.
- The pressure free sintered silicon carbide can withstand high concentrations of sulfuric acid, nitric acid, phosphoric acid, mixed acid, strong alkali, oxidant, and other highly corrosive materials
- This material is the only ceramic material that cannot be corroded by hydrofluoric acid.
- It has an excellent service life.
| Corrosive medium | Temperature（℃） | Corrosion rate mg/cm2.Y | Corrosion rate mm/Y | |
| 98%H2SO4 | Sulfuric acid | 100 | 0.98 | 0.0032 |
| 54%HF | Hydrofluoric acid | 25 | 0.06 | 0.0002 |
| 50%NaOH | Sodium hydroxide | 100 | 1.25 | 0.0040 |
| 45%KOH | Potassium hydroxide | 100 | 0.04 | 0.0001 |
| 70%HNO3 | Nitric acid | 86 | 0.04 | 0.0001 |
| 37%HCL | Hydrochloric acid | 25 | 0.07 | 0.0002 |
| 10%HF&HNO3 | Hydrofluoric acid & nitric acid | 25 | 0.05 | 0.0002 |
| 10%HF&HNO3 | Hydrofluoric acid & nitric acid | 120 | 1.25 | 0.0040 |
3. Excellent thermodynamic properties
- High strength and high hardness
- The pressure free sintered silicon carbide has a high abrasion resistance and anti-penetrant efficiency under high temperature and high pressure conditions.
- This material allows the medium to pass through at high speeds.
- It can work normally at 1300 ℃.
| Detected Items | Detection result |
| Volume density | 3.12 g/cm3 |
| Bending strength | 400 MPa |
| Strength of anti-static pressure | 20 MPa |
| Elastic modulus | 410 GPa |
| Fracture toughness | 3.80 Mpa*m1/2 |
| Heat conductivity(room temperature) | 140 W/m*K |
| Coefficient of thermal expansion | 4.66（RT-1000oC）10-6/K |
- The silicon carbide heat exchanger has a lower price and shorter delivery period, compared to noble metals such as tantalum, zirconium and hastelloy alloy.
- This heat exchanger features a higher strength, higher purity and stronger corrosion resistance in comparison with graphite heat exchangers.
- Compared with enamel heat exchangers, heat exchangers made using a pressure free sintered silicon carbide has a stronger acid resistant performance, which avoids chipping that occurs when using enamel materials.
- Our heat changer has an excellent thermal conductivity and stronger pressure resistance which can reach 100Bar in the tests compared with Teflon heat exchangers.