| abstract |
The raw materials for forming a cordierite composition are dissolved into water with a dispersing agent to prepare a slurry, and the thus prepared slurry is passed through the sieve having a mesh of 45 mum or less. After that, the slurry after sieving is dried by means of the spray drying to obtain dry powders, and the batch for forming is obtained by using the dry powders. Or, the batch for forming is obtained by the filter pressing. That is to say, the batch for forming is obtained by using the raw material powders which are passed through the sieve in a wet state. Therefore, it is possible to prevent agglutination of the raw material particles and to remove the coarse raw material particles effectively. As a result, if the extrusion molding is performed by using the thus obtained batch for forming, it is possible to form the ceramic honeycomb structural body having an extremely thin wall thickness with no defects. |