Ngk Insulators, Inc.

Mitsuharu Ono

Shuji Ueda

Shigeki Kato

Hiroyuki Suenobu

Satoshi Sakashita

Shogo Hirose

Hirotaka Yamamoto

Hiroyuki Nagaoka

Fumiharu Sato

Shiori Nakao

A honeycomb structure includes a cordierite component, and has partition walls defining a plurality of cells which extend from one end face to the other end face and form through channels for a fluid, a thermal expansion coefficient in a central axis direction is 1.2 ppm/K or more and 3.5 ppm/K or less in a temperature change of 40&#xb0; C. to 800&#xb0; C., and a thermal expansion coefficient in a cross-sectional direction orthogonal to the central axis direction is 0.8 ppm/K or more and 2.5 ppm/K or less in the temperature range of 40&#xb0; C. to 800&#xb0; C.

Honeycomb structure and manufacturing method of honeycomb structure

A honeycomb structural bodycomprises a porous partition portionwhich forms a plurality of cells each functioning as a flow path of a fluid, and in the partition portion, the average pore diameter is 10 to 20 &#x3bc;m, and a wet area rate R (=S/V) which is the rate of a wet area S of pores to a volume V of the partition portionis 0.000239 &#x3bc;mor more.

Honeycomb structural body and method for manufacturing the same

A microwave drying method includes: an introduction step of disposing a honeycomb formed body while keeping an axis direction X of cells of the honeycomb formed body vertically and introducing the honeycomb formed body into a drying furnace capable of irradiating with microwaves; a reflector placing step of placing a microwave reflector having a function to reflect the microwaves above and/or below around the honeycomb formed body; and a microwave drying step of irradiating with the microwaves while controlling temperature of an inside of the honeycomb formed body by the microwave reflector so that any one of the end faces (e.g., end face) of the honeycomb formed body reaches 100&#xb0; C. to dry the honeycomb formed body after the other part of the honeycomb formed body reaches 100&#xb0; C.

Microwave drying method of honeycomb formed body

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 SiOin the porous body is 70 mass % or more, and a thermal expansion coefficient of the porous body at 40 to 800&#xb0; C. is from 1.5 to 6.0&#xd7;10/&#xb0; C.

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Nagoya, Japan

Mitsuharu Ono