Cordierite honeycomb structural body and method for its production

摘要

There are provided thin-walled honeycomb structural bodies with high strength and excellent thermal shock resistance by using as the starting material for cordierite honeycomb structural bodies a combination of talc with a median particle diameter exceeding 7 mu m and not greater than 20 mu m and with a CaO content of 0.2 wt % or less and another cordierite material such as kaolin with a median particle diameter of not greater than 1 mu m, molding the starting material into a honeycomb shape with a cell wall thickness of 130 mu m or less, and firing the mold.