Patent ID: 8669199

Claim:
A cordierite-forming batch material comprised of inorganic batch components comprising: at least one source of magnesium oxide; at least one non-kaolin clay source of alumina; at least one non-kaolin clay source of silica chosen from fused silica, sol-gel silica, silicone resin, low-alumina substantially alkali-free zeolite, diatomaceous silica, quartz, cristobalite, other crystalline silica, silicic acid and silicon organometallic compounds; and at least one kaolin clay; wherein the at least one kaolin clay comprises at least one raw kaolin clay having a BET surface area greater than 22 m 2 /g; and wherein the cordierite-forming batch material has an overall composition comprising, in weight percent on an oxide basis, 5-25% MgO, 35-60 wt % SiO 2 , and 25-50 wt % Al 2 O 3 .