Honeycomb structure

Patent metadata

Field	Value
Publication number	US-9333486-B2
Application number	US-201514660066-A
Country	US
Kind code	B2
Filing date	Mar 17, 2015
Priority date	Mar 26, 2014
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

There is disclosed a honeycomb structure. A honeycomb structure includes a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face, the partition walls are constituted of a porous body having aggregates and a bonding material to bond the aggregates to one another in a state where pores are formed among the aggregates, the aggregates include molten silica particles, the bonding material includes glass, a content ratio of SiO 2 in the porous body is 70 mass % or more, and a thermal expansion coefficient of the porous body at 40 to 800° C. is from 1.5 to 6.0×10 −6 /° C.

First claim

What is claimed is:

1. A honeycomb structure comprising a pillar-shaped honeycomb structure body having partition walls defining a plurality of cells which become through channels for a fluid and extend from a first end face to a second end face,
wherein the partition walls are constituted of a porous body having aggregates and a bonding material to bond the aggregates to one another in a state where pores are formed among the aggregates, the aggregates include molten silica particles, and the bonding material includes glass, and
a content ratio of SiO 2 in the porous body is 70 mass % or more, and a thermal expansion coefficient of the porous body at 40 to 800° C. is from 1.5 to 6.0×10 −6 /° C.

2. The honeycomb structure according to claim 1 ,
wherein porosity of the partition walls is from 10 to 60%.

3. The honeycomb structure according to claim 2 ,
wherein a mass ratio of an alkali metal included in the porous body is from 10 mass % or less.

4. The honeycomb structure according to claim 3 ,
which further comprises a catalyst loaded onto at least one of each surface of the partition walls and each pore formed in the partition walls, and including titanium oxide as a main component and further including tungsten oxide and vanadium oxide.

5. The honeycomb structure according to claim 2 ,
which further comprises a catalyst loaded onto at least one of each surface of the partition walls and each pore formed in the partition walls, and including titanium oxide as a main component and further including tungsten oxide and vanadium oxide.

6. The honeycomb structure according to claim 1 ,
wherein a mass ratio of an alkali metal included in the porous body is from 10 mass % or less.

7. The honeycomb structure according to claim 6 ,
which further comprises a catalyst loaded onto at least one of each surface of the partition walls and each pore formed in the partition walls, and including titanium oxide as a main component and further including tungsten oxide and vanadium oxide.

8. The honeycomb structure according to claim 1 ,
which further comprises a catalyst loaded onto at least one of each surface of the partition walls and each pore formed in the partition walls, and including titanium oxide as a main component and further including tungsten oxide and vanadium oxide.

Assignees

• Ngk Insulators Ltd

Inventors

• Ono Mitsuharu
• Sato Fumiharu
• Ueda Shuji
• Suenobu Hiroyuki

Classifications

• B01J35/57

  Honeycombs · CPC title

• B01D2255/20707

  Titanium · CPC title

• B01J21/16 Primary

  Clays or other mineral silicates · CPC title

• B01D46/2418

  Honeycomb filters (used for filtering exhaust gases of an internal combustion engine F01N3/022; ceramic honeycomb structures per se C04B38/0006) · CPC title

• C04B35/14 Primary

  based on silica · CPC title