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Material Composition: Its major material is composed of cordierite and stainless steel of iron. The material for catalytic converter substrate is cordierite.
The natural cordierite exists very rare in nature, so most of cordierites are man-made substances.
Low thermal expansion coefficient and good thermal shock resistance.
High anti-acid, anti-alkali, anti-erosion function, and good mechanical strength.
The usual CPSI for catalytic converter substrate is 400.
Round, racetrack, ellipse, and custom shapes tailored to different car models.
| Item | Unit | Alumina Ceramic | Dense Cordierite | Cordierite | Mullite |
|---|---|---|---|---|---|
| Density | g/cm³ | 2.68 | 2.42 | 2.16 | 2.31 |
| Bulk Density | kg/m³ | 965 | 871 | 778 | 832 |
| Thermal Expansion Coefficient | 10⁻⁶/K | 6.2 | 3.5 | 3.4 | 6.2 |
| Specific Heat Capacity | J/kg·K | 992 | 942 | 1016 | 998 |
| Thermal Conductivity | W/m·K | 2.79 | 1.89 | 1.63 | 2.42 |
| Thermal Shock Resistance | Max K | 500 | 500 | 600 | 550 |
| Softening Temperature | ℃ | 1500 | 1320 | 1400 | 1580 |
| Maximum Service Temperature | ℃ | 1400 | 1200 | 1300 | 1480 |
| Average Heat Capacity | W/m·K/m³·K | 0.266 | 0.228 | 0.219 | 0.231 |
| Water Absorption | % | ≤20 | ≤5 | 15-20 | 15-20 |
| Acid Resistance | % | 0.2 | 5.0 | 16.7 | 2.5 |
