| 摘要 |
A cordierite ceramic honeycomb having a low thermal expansion, characterized in that it comprises 60 % or more of a codierite crystal phase and 30 % or less of an indialite crystal phase, wherein the sum of cordierite and indialite phases accounts for 85 % or more of the total phase thereof; and a method for manufacturing the honey comb, wherein a raw material batch is provided by admixing a raw material with a forming aid, the batch is formed by extrusion, dried and then subjected to firing, characterized in that, in the firing step, the rate of the decrease in temperature from the maximum to 1300~C is 100~C/hr or less. The low thermal expansion of the ceramic honey comb has been achieved by controlling its crystal phase through adjusting th e temperature during the formation of its crystal.
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