CORDIERITE HONEYCOMB ARTICLE AND METHOD OF MANUFACTURE

摘要

Disclosed are ceramic honeycomb articles which are composed predominately of a crystalline phase cordierite composition. The porous cordierite ceramic honeycomb articles has a plurality of cell channels and intersecting porous walls and possess a microstructure characterized by a pore size distribution wherein greater than or equal to 75% of the pore size distribution of the porosity of the porous walls, by volume, have a pore diameter (dv) wherein dvv v90 -7/°C from 25°C to 800°C. The articles exhibits high filtration efficiency coupled with low pressure drop across the filter. Additionally, high porosity articles having porosity greater than or equal to 40% and low surface roughness of Ra < 4.0 µm are described. Additionally, a method for manufacturing the ceramic honeycomb articles wherein fine talc, fine silica-forming source and a fine pore former are disclose.