The substrate is a ceramic honeycomb-like which provides surface area for the catalyst and where the washcoat is deposed.The washcoat is a deposit which increases the effective area of the substrate. How does a catalytic converter work?ДЄ catalytic converter is composed of a substrate, the washcoat, catalysts, the mat and the can. They are used to convert pollutants like CO, HC and NOx in some particular cases. These catalytic convertors are wall through chemical reactors which are integrated in the exhaust pipe. The first application of cordierite in automotive industry was the usage of cordierite ceramics in the catalytic converters from the middle of seventies. Cordierite ceramic honeycomb based catalytic converters It is used in electrical insulation domain, high performance resistors, burner tubes, and of course exhaust catalysts supports and filters. Cordierite is a high volume through-put via low cost extrusion or dye-pressing processes. However, it has a high coefficient of thermal expansion (CTE) and a relatively low density. It has a high thermal resistance and is a relatively strong material.

Deposits can be found in Sri Lanka, India, Burma, Madagascar, USA and Canada. The cordierite is issued from sedimentary rocks.

Cathalitic convertos honeycomb