Ceramic Substrate
With its nature of crystallization, crystallo-chemical formula cordierite has extremerly low coefficient of thermal expansion (CTE);
High specific surface area, low pressure drop, rapid light-off time and reliable & durable performance are achieved through high cell density of 400 CPSI;
Honeycomb-like structure with thousands of parallel channels forces exhaust gases into the turbulent flow regime resulting in better contact between emission and precious metal, enhanced mass-transfer conditions, and higher conversion efficiency;
All of these make our ceramic honeycomb an ideal catalyst substrate media for oxidation & reduction catalyst;
At present, our typical substrate are available in a variety of sizes with the different shapes, such as: round, oval, race track and so on.
Physical Prosperity:
Raw material |
cordierite>=90% |
Shape |
Round,Raceway,Oval,Raceway-Round |
Compressive strength |
A direction>=15Mpa: parallel to passageways B direction>=3Mpa: perpendicular to passageways and parallel to passageway walls C direction>=0.15Mpa |
water absorption |
23-27% |
Softening temperature |
>=1380℃ |
Work temp. Max. |
>=1600℃ |
Coefficient of Thermal Expansion |
<=1.5*10-6/℃ (20~800℃) |
Cells per square inch (CPSI) |
400CPSl |
Channel width (mm) |
0.17~0.20mm |
Gross density |
0.38~0.50g/cm3 |
Thermal Shock Resistance |
Three times at 450 ℃ |
Tolerance |
±1% |
Chemical Composition
Item |
Content |
SiO2 |
50.9±1% |
Al2O3 |
35.2±10% |
MgO |
13.9±1% |
Diesel particulate filter (DPF)
cordierite DPF, which consists of parallel channels, separated by thin walls made of porous cordierite. The channels are open at one end, but plugged at the other. During operation, the exhaust gases are forced to flow through the thin walls and leave particulates trapped in the filter walls.
Cordierite DPF is mailnly used in the diesel engine automobile to solve the air pollution problem. The effect is better than the ceramic substrate.
DPFs enable highly efficient particulate matter trap systems by offering:
• Low thermal expansion
• High filter specific surface area
• Low pressure drop
• Long-term durability performance
• High soot removal: >95%
