... resistances, high specific surface area, low resistance, low thermal expansion coefficient, good thermal conductivity and thermal-shock resistance performance. Material: Mullite, Cordierite, Alumina ... Ceramics It can used as catalysts carrier for clean-up of automobile tail gas, carrier for purification system, heat retainer in the ... Cell-opening Ratio(%) 67 64 63 Honeycomb ceramic block for RTO, RCO