Extruded cordierite honeycombs material properties

Extruded cordierite honeycombs also have applications in other fields because of their unique material and structural properties such as high porosity, low thermal expansion, high geometric surface area, and low gas flow restriction [2]. Utilizing their porous ceramic wall as filters, extruded honeycombs can be used as trap oxidizers to eliminate toxic particulate matter from diesel engine exhaust. [Pg.367]

Table 13.1.2 shows the material properties of standard extruded cordierite honeycombs. Extruded cordierite honeycombs have an extremely low coefficient of thermal expansion from 40 to 800°C, hence, high thermal shock resistance is expected. The softening temperature is above 1410°C. Porosity is 35%, and mean pore diameter is 5 (jtm (typical value). [Pg.368]

TABLE 13.1.2 Material Properties of Extruded Cordierite Honeycombs... [Pg.370]

Figure 13.1.4 shows the thermal expansion of extruded cordierite from 40 to 800°C, in comparison with other ceramics. No material is equal to cordierite in thermal expansion properties. Hence, extruded cordierite honeycombs having extremely low thermal expansion, are widely used as automotive catalyst substrates, diesel particulate filters, and heat exchangers, where high thermal shock resistance is required. [Pg.370]