AUTO and Motor Catalyst Support
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.
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. |
Specification:
Type |
Cells per square inch (CPSI) |
Wall thickness mm | Channel width |
Channel area |
Free area |
Inside surface area m2/liter |
Approximate |
MC-26 |
400 |
0.17 |
1.10 |
1.210 |
75 |
2.728 |
480 |
MC-27 |
400 |
0.20 |
1.07 |
1.745 |
71 |
2.654 |
480 |
MC-28 |
400 |
0.23 |
1.04 |
1.082 |
67 |
2.579 |
480 |
MC-29 |
300 |
0.19 |
1.28 |
1.625 |
74 |
2.310 |
500 |
MC-30 |
300 |
0.22 |
1.25 |
1.550 |
70 |
2.260 |
500 |
MC-31 |
300 |
0.25 |
1.22 |
1.476 |
67 |
2.200 |
500 |
MC-32 |
200 |
0.21 |
1.58 |
2.490 |
77 |
1.957 |
435 |
MC-33 |
200 |
0.24 |
1.55 |
2.396 |
74 |
1.920 |
435 |
MC-34 |
200 |
0.26 |
1.53 |
2.335 |
72 |
1.895 |
435 |
MC-35 |
100 |
0.35 |
2.18 |
4.766 |
74 |
1.354 |
465 |
MC-36 |
100 |
0.38 |
2.15 |
4.635 |
72 |
1.334 |
465 |
MC-37 |
100 |
0.40 |
2.13 |
4.550 |
71 |
1.323 |
465 |
MC-38 |
50 |
0.64 |
3.00 |
9.000 |
67 |
0.672 |
565 |
MC-39 |
50 |
0.67 |
2.97 |
8.821 |
66 |
0.659 |
565 |
MC-40 |
50 |
0.69 |
2.95 |
8.703 |
65 |
0.650 |
565 |
