Ceramic Substrates for Passenger Cars
Ceramic substrates made of cordierite have been used for the purification of automotive exhaust gas from internal combustion engines world-wide. In addition to light weight, a variety of shapes offer flexibility for the converter design. Over 1 billion substrates have to date been used in vehicle applications.
Advanced Ceramic Substrates
Automobile manufacturers and emission system suppliers continue to provide new technology for low temperature capability and high temperature durability. The targets of higher engine power (reduced pressure drop), higher fuel economy, and durability continue to be demanded from the automotive industry. Various new technologies are presently available for these requirements and will be briefly discussed.
Thin Wall and Ultra Thin Wall Substrate
Bulk density and cell structure have a direct effect on the warm-up characteristics of the substrate. By reducing the bulk density, wall thickness and increasing geometric surface area (GSA), the substrate not only warms up faster, but also improves catalytic activity.
- Compliance with tighter emission regulation.
- Catalyst down-sizing and saving precious metal.
- Low pressure drop.