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Corundum Ceramic Honeycomb for Heating Furnace
Physical Properties:
1) Compressive strength
| Direction | 200 MCI | 400 MCI |
A (minimum) | 15.0 MPa | 15.0 MPa |
B (minimum) | 1.5 MPa | 1.5 MPa |
C (minimum) | 0.2 MPa | 0.2 MPa |
Specimen dimensions Φ25.4 mm, length 25.4 mm from direction A, B and C, where
Speed: 1mm/min | ||
2) Porosity/water absorption
| Item | 200 MCI | 400 MCI |
Minimum | 18.6% | 17.8% |
Maximum | 23.4% | 20.7% |
Average (n>5 per lot) | 22.1% | 19.6% |
Total pore volume | 0.18-0.24 (cm3/g) | 0.18-0.24 (cm3/g) |
3) Bulk density
| 100 MCI | 0.46 g/cm3±15% |
200 MCI | 0.43 g/cm3±15% |
300 MCI | 0.50 g/cm3±15% |
400 MCI | 0.48 g/cm3±15% |
4) Coefficient of Thermal Expansion
| Item | 200 MCI | 400 MCI |
Heating rate | 5C/min, 20C…1000C | 5C/min, 20C…1000C |
Average | 1.5*10-6K-1 | 1.8*10-6K-1 |
5) Thermal Conductivity
1.5…1.6 W/mk at temperature 25C…600C
6) Specific Heat Capacity
At:100C/200C/300C
800KJ/Kg950KJ/Kg2000KJ/Kg
7) Continuous High Temperature Durability
Maximum shrinkage of length after 100 hours at 1200C
200MCI 400MCI
Maximum:0.5% 0.1%
8) High Temperature Stability
Maximum shrinkage after 100 hours at 1450C
200 MCI400 MCI
Maximum2.0%2.5%
9) Gas Flow Resistance
Flow speed 16m/s200 MCI400 MCI
Pressure drop {10-2mmAg/mm} 60130
10) Structural Integrity to Thermal Shock
(Cooling with water)
Cracks start at approx. 800C
No destruction of ceramic bodies until approx. 1180C
11) Softening temperature
Definition: temperature, at which the instantaneous rate of thermal expansion is zero.
Procedure: analogous to coefficient of thermal expansion; determination with extrapolation.
Minimum: 1380C
Chemical Composition:
| Item | Stoneware | Cordierite | Mullite- Cordierite | Mullite |
| SiO2 | 69~71 | 46~48 | 29~30 | 27~28 |
| Al2O3 | 18~20 | 34~37 | 68~69 | 70~71 |
| MgO | 0.15~0.20 | 7.00~7.50 | --- | --- |
| K2O.Na2O.CaO | 3.00~3.30 | 2.50~2.90 | 0.70~0.90 | 0.80~1.20 |
| Fe2O3 | 0.70~0.90 | 0.70~0.90 | 0.50~0.70 | 0.50~0. |
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Grace Zhang
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We Specialized in Manufacturing molecular sieve, random and structured chemical packing in ceramic, plastic & metal, honeycomb ceramics, inert ceramic balls, activated alumina, alumina grinding balls, etc.
We has an annual manufacturing capacity of 5000 ton molecular sieves, 20000 m3 of varieties types of chemical packings, 3000 m3 of honeycomb ceramics and 5000 m3 of inert ceramic balls, 2000 ton activated alumina etc.
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