| 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 dv<10.0 mum and less than or equal to 35% of the pore size distribution have dv<=4.0 mum. Additionally, the pore diameter dv90<=14.0 mum, and CTE<=12.0x10-7/° 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 mum 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.
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