US 10,472,290 B2 · Honeycomb structure and production method for said honeycomb structure

Abstract

The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (μm) on the horizontal axis and log differential pore volume (ml) on the vertical axis, at least one peak is present in each of the pore size ranges of 0.01 to 0.1 μm and 0.1 to 5 μm.

Claims20

Dependent claims

A honeycomb structured body comprising:

a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween,
wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and
when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (μm) on the horizontal axis and log differential pore volume (ml) on the vertical axis,
at least one peak is present in each of the ranges of 0.01 to 0.1 μm and 0.1 to 5 μm.

1 more element

A method for producing a honeycomb structured body comprising a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method comprising:

a molding step of molding a raw material paste containing ceria-zirconia composite oxide particles and alumina particles into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween;
a drying step of drying the honeycomb molded body obtained in the molding step;
and
a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body,
wherein the alumina particles for use in preparation of the raw material paste have an average particle size of 1 to 5 μm, a cumulative particle size distribution D10 of 0.5 to 2 μm, and a cumulative particle size distribution D90 of 2 to 10 μm,
the ceria-zirconia composite oxide particles have an average particle size of 1 to 5 μm, a cumulative particle size distribution D10 of 0.5 to 2 μm, and a cumulative particle size distribution D90 of 2 to 10 μm, and
the alumina particles have an average particle size larger than the average particle size of the ceria-zirconia composite oxide particles.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/245,257Filed 11 Jan 2019 · continuation

Priority

JP 2016-13968514 Jul 2016

Published

US 2019/0144342 A116 May 2019

Granted

12 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification33 codes

C04B 38/0009
Honeycomb structures: characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls
B01D 53/94
Of engine exhaust gases: by catalytic processes
B01J 23/10
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00: of rare earths
B01J 23/63
Platinum group metals: with rare earths or actinides

Honeycomb structure and production method for said honeycomb structure

Life of this patent

Honeycomb structure and production method for said honeycomb structure

Life of this patent

Abstract

Claims20