HIGH-STRENGTH CORDIERITE MASS OF LOW EXPANSION AND HIGH POROSITY AND METHOD OF PRODUCTION OF SUCH MASS Russian patent published in 2005 - IPC

FIELD: ceramic masses for manufacture of cordierite articles used as catalytic carriers.

SUBSTANCE: burnt ceramic article has average linear coefficient of thermal expansion below 5.0x10^-7°C^-1 at total porosity from 20% to 30%; amount of pores having size lesser than 2 mcm is about 86%. Pores are interconnected; they are longitudinal in shape and are oriented over oval axis in plane of sheets. Method of production of burnt cordierite ceramic article includes mixing plate talc, source of Al₂O₃ and one or more components from the following group: kaolin, burnt kaolin, silicon dioxide or corundum; each of them has particles lesser than 5 mcm. Mass thus obtained is extruded to cellular article after which burning is performed.

EFFECT: high resistance to thermal impacts; enhanced covering with suspension.

15 cl, 3 dwg, 2 tbl, 3 ex