US Patent 9822681 Plugged honeycomb structure and manufacturing method of the same

There is disclosed a plugged honeycomb structure. A plugged honeycomb structure includes a tubular honeycomb structure body having partition walls including a porous partition wall base material defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, and a porous trapping layer disposed on the surface of the partition wall base material; and plugging portions disposed in open ends of predetermined cells in the first end face and open ends of residual cells in the second end face, and the partition wall base material is constituted of a porous body including α-Al2O3 as a main phase and further including aluminum titanate and glass.