Honeycomb structure
AssigneeNGK Insulators, Ltd.
InventorsYuya Ido, Shogo Hirose
Life of this patent
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Abstract
A honeycomb structure includes a pillar-shaped honeycomb structure body having a porous partition wall and a circumferential wall, wherein in a section orthogonal to the extending direction of the cells of the honeycomb structure body, the shape of the cell is a polygonal shape with a corner having an arc shape, a thickness T1[mm] of the partition wall is 0.0500 to 0.1400 mm, a radius of curvature R1[mm] of the corner having the arc shape of the cell and the thickness T1[mm] of the partition wall satisfy the relationship of Equation (1), in the section orthogonal to the extending direction of the cells of the honeycomb structure body, the outer diameter of the honeycomb structure body is 190.5 to 355.6 mm, and a porosity of the partition wall is 20 to 40%. 0.0050≤R1×T1≤0.0150 Equation (1):
Claims2
A honeycomb structure comprising:
- a pillar-shaped honeycomb structure body having a plurality of porous partition walls that define and surround a plurality of cells which serve as fluid through channels extending from a first end face to a second end face;
- and a circumferential wall disposed so as to encompass the plurality of porous partition walls, wherein
- the honeycomb structure is made of cordierite,
- the first end face and the second end face of the honeycomb structure body have a circular or oval shape,
- the circumferential wall of the honeycomb structure body has a shape of a cylinder that extends between a circumference of the first end face and a circumference of the second end face,
- the honeycomb structure body has a cell density that is uniform over the entire first end face and the entire second end face,
- in a section orthogonal to the extending direction of the cells of the honeycomb structure body, the shape of the cell is a quadrangular shape with a corner having an arc shape,
- a thickness T1 (mm) of the plurality of porous partition walls is 0.0635 to 0.0889 mm,
- a radius of curvature R1 (mm) of the corner having the arc shape of the cell is 0.07 to 0.12 mm,
- the radius of curvature R1 (mm) of the corner and the thickness T1 (mm) of the plurality of porous partition walls satisfy the relationship of Equation (1),
- in the section orthogonal to the extending direction of the cells of the honeycomb structure body, the outer diameter of the honeycomb structure body is 190.5 to 355.6 mm,
- a porosity of the plurality of porous partition walls is 20 to 40%,
- 0.0050≤R1×T1≤0.0150 Equation (1),
- the honeycomb structure has an isostatic strength of 1.0 MPa or more, and
- the honeycomb structure exhibits a pressure loss of less than 0.7 kPa, where the pressure loss is measured by passing air with a constant flow rate of 20 m3/min through the honeycomb structure at normal temperature and measuring a differential pressure between the first end face and the second end face with a differential pressure gauge.
Dependencies are inferred from the claim text.