yixing xinwei leeshing refractory materials co.,Ltd
Excellent quality, Customer first, Common development
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high temperature custom heat resistant high alumina silica refractory bricks
Excellent strength at ambient and elevated temperatures.High compressive strength.
Very low levels of iron and other impurities and energy-efficient.
Lower heat storage than denser refractory.Heats quickly and economically to operating temperature.
Physical and Chemical Indicators Of Silicon Carbide Refractory Brick :
| specification item | pledge value | practice-test value | |
| SiC % | ≥75 | 75.02 | |
| Si3N4 % | ≥18 | 21.78 | |
| Fe2O3 % | ≤0.7 | 0.53 | |
| Apparent porosity % | ≤16 | 14 | |
| Bulk density | g/cm3 | ≥2.65 | 2.75 |
| Cold crushing strength | Mpa | ≥170 | 245.9 |
| Modulus of pupture | Mpa | ≥42 | 55.7 |
| Modulus of pupture(Mpa) 1400℃×0.5h | ≥45 | 58.0 | |
| W/m.k thermal conductivity | ≥16 | 19.9 | |
| Item/Grade | High Alumina Refractory Brick | |||
| SK-36 | SK-37 | SK-38 | SK-40 | |
| Al2o3% (≥) | 55 | 65 | 70 | 82 |
| Fe2o3% (≤) | 2.0 | 2.0 | 2.0 | 2.0 |
| Refractoriness (SK) | 36 | 37 | 38 | 40 |
| Refractoriness under load, 0.2MPa, ℃ (≥) | 1450 | 1480 | 1530 | 1600 |
| Porosity(%) | 20-23 | 20-23 | 20-22 | 18-20 |
| Density(g/cm3) | 2.25-2.4 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength, MPa (≥) | 45 | 50 | 60 | 70 |