Sumitomo Chemical Company, Limited

Kentaro Iwasaki

Hajime Yoshino

Teruo Komori

Tatsuro Kawauchi

Tetsuro Tohma

Akiyoshi Nemoto

A cylindrical honeycomb structurehas a partition wallforming A channelsand B channels. The A channelsare open at a first end surfaceand closed at a second end surface. The B channelsare closed at the first end surfaceand open at the second end surface. The B channelsinclude a first B channeland a second B channelextending substantially in parallel to each other. The A channelsinclude first A channels, which surround the first B channel at the first end surface, and second A channels, which surround the second B channel at the first end surface. The partition wallhas a first group partition wall, which separates adjacent channels of the first A channelsand the second A channelsfrom each other.

Honeycomb structure

The columnar honeycomb structureextending along a central axis CL, including a first end surfaceand a second end surface, and a partition wallforming a plurality of first flow passages Ra and a plurality of second flow passages Rb, in which the first flow passages Ra are opened at the side of the first end surfaceand plugged at the side of the second end surface, the second flow passages Rb are plugged at the side of the first end surfaceand opened at the side of the second end surface, and the honeycomb structure includes a circular row W formed by arranging the second flow passages Rb adjoining and partitioned by the partition wallin a circular pattern.

Particulate filter

The production method of the present invention is a method for producing porous aluminum magnesium titanate by forming a mixture containing Al source powder, Mg source powder, Ti source powder and Si source powder as well as a pore-forming agent to obtain a molded body; presintering the obtained molded body; and then sintering the presintered molded body, wherein the content of the pore-forming agent to a total of 100 parts by mass for the Al source powder, Mg source powder, Ti source powder and Si source powder is 5 to 30 parts by mass, the melting point of the Si source powder is 600 to 1300&#xb0; C., when the elemental composition ratio of Al, Mg, Ti and Si in the mixture is represented by compositional formula (1):AlMgTiO+aAlO+bSiO&#x2003;&#x2003;(1),x satisfies 0.05&#x2266;x&#x2266;0.15, a satisfies 0&#x2266;a&#x2266;0.1 and b satisfies 0.05&#x2266;b&#x2266;0.15, and the presintered molded body is sintered at 1300 to 1560&#xb0; C.

Method for producing porous aluminum magnesium titanate and porous aluminum magnesium titanate

The invention is to provide an aluminum titanate-based ceramics showing a good mechanical strength. The invention is an aluminum titanate-based ceramics obtained by firing a starting material mixture which contains a titanium element and an aluminum element, and further contains a chromium element and/or a tungsten element. Preferably, a content of a chromium source which contains the chromium element is from 0.001 to 5 parts by mass, and a content of a tungsten source which contains the tungsten element is from 0.001 to 1.0 part by mass relative to 100 parts by mass of the starting material mixture.

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Wroclaw, Poland

Kentaro Iwasaki