Catalyst carrier cordierite honeycomb ceramics for DOC

Short Description:

Ceramic honeycomb substrate (catalyst monolith) is a new kind of industrial ceramic product, as a catalyst carrier which are widely used in automobile emissions purifying system and industrial exhaust gas treatment system.

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Catalytic converter substrate for vehicle:

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. The major features for such cordierite are low thermal expansion coefficient, good thermal
shock resistance, high anti-acid, anti-alkali and antii-erosion function and good mechanical strength.
The usual CPSI for catalytic converter substrate is 400. The shape of honeycomb ceramic is round, racetrack, ellipse and other
special shape according to the customer’s requirement in order to meet the different cars models requirements.

Properties of Honeycomb Ceramics

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