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A three-way catalytic converter (DOC) is the most important external purification device installed in the automobile exhaust system. It can convert harmful gases such as carbon monoxide (CO), hydrocarbons (HC), emitted from the automobile exhaust into harmless
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Thermal shock resistance | Keep at 550 ºC for 30 minutes, quickly remove and cool at room temperature for 30 minutes. Repeat this process continuously for 3 times | muffle furnace | ||
compressive strength | A-axis | >=7Mpa | Compression strength machine | |
B-axis | >=2Mpa | |||
Thermal expansion coefficient (room temperature -800 ºC) | ≤1.0*10 -6/ºC(A-axis) | Thermal expansion coefficient meter | ||
Water absorption rate | 22%-26% | Electronic scale | ||
Content of main crystal phase in cordierite | >=90% | XRD | ||
verticality | Height ≤ 100 mm, verticality ≤ 1 mm; Height>100 | |||
Parallelism | Diameter ≤ 100mm, tolerance ≤ 1mm; Diameter>100mm, tolerance ≤ 1% of product outer diameter dimension. | |||
chemical composition | AL203 | (49.7±1.5)%, | ||
Mg0 | (13.5±1.5)%; | |||
Si02 | (35.4±1.5)%, | |||