Patent ID: 8747511
Filing Date: 2014-06-10
Classification: B01D,B82Y,C04B,F01N

Abstract:
1. A honeycomb filter comprising: a tubular honeycomb structure having porous partition walls with which there are formed a plurality of cells extending from one end surface to the other end surface to become through channels of a fluid, wherein the material that makes up the partition walls contains at least one of lithium, cerium, zirconium and yttrium; and plugged portions arranged in one open end portion of each of the predetermined cells and the other open end portion of each of the remaining cells, wherein porosities of the partition walls are 46% or less, a pore volume ratio of pores having pore diameters of 40 μm or more is 7.5% or less, and a pore volume ratio of pores having pore diameters of 10 μm or less is 25% or less, a permeability of the honeycomb structure is 0.8 μm a coefficient of thermal expansion of the honeycomb structure in a range of 40° C. to 800° C. is 1.0×10