Ngk Insulators, Inc.

Kimiko Kishine

Fumihiko Yoshioka

Kyohei Kato

Yuji Sasaki

Sachiko Ishida

A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 8 to 12 and in a pore diameter distribution which indicates a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (&#x3bc;m) on an abscissa axis and a log differential pore volume (cm/g) on an ordinate axis, a first peak that includes a maximum value of the log differential pore volume has a pore diameter value of 10 &#x3bc;m or less, the pore diameter value corresponding to a &#x2153; value width of the maximum value.

Honeycomb filter

A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 13 to 18 &#x3bc;m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (&#x3bc;m) on an abscissa axis and a log differential pore volume (cm/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 15 &#x3bc;m or less, the pore diameter value corresponding to a &#x2153; value width of the maximum value.

A honeycomb filter includes a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells and a plugging portion, wherein the partition wall is composed of a material containing cordierite as a main component thereof, porosity of the partition wall measured by a mercury press-in method is 60 to 68%, an average pore diameter of the partition wall measured by a mercury press-in method is 19 to 26 &#x3bc;m, and in a pore diameter distribution indicating a cumulative pore volume of the partition wall measured by a mercury press-in method, with a pore diameter (&#x3bc;m) on an abscissa axis and a log differential pore volume (cm/g) on an ordinate axis, a first peak including a maximum value of the log differential pore volume has a pore diameter value of 18 &#x3bc;m or less, the pore diameter value corresponding to a &#x2153; value width of the maximum value.

A honeycomb filter includes a pillar-shaped honeycomb structure having porous partition walls placed, surrounding a plurality of cells which serve as fluid through channels extending from an inflow end face to an outflow end face; and porous plugging portions provided either at the ends on the inflow end face side of the cells or at the ends on the outflow end face side of the cells, wherein the plugging portions include plugging portions that have voids therein, and in the plugging portions having the voids, porosity including the voids as pores ranges from 68% to 83%.

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Nagoya, Japan

Kimiko Kishine