The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 1989
Filed:
Feb. 03, 1988
Takashi Harada, Nagoya, JP;
Toshiyuki Hamanaka, Suzuka, JP;
Kunikazu Hamaguchi, Nagoya, JP;
Seiichi Asami, Okazaki, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A cordierite honeycomb structural body to be used as a catalyst carrier, having excellent heat resistance, thermal shock resistance and coatability with a high specific surface area material and a catalyst is disclosed, which have a chemical composition consisting mainly of 42-56% by weight SiO.sub.2, 30-45% by weight of Al.sub.2 O.sub.3 and 12-16% by weight of MgO, having a crystal phase consisting mainly of cordierite, and having coefficients of thermal expansion of not higher than 0.3.times.10.sup.-6 /.degree.C. in the flow-passage direction of the honeycomb structure and not higher than 0.5.times.10.sup.-6 /.degree.C. in a direction perpendicular to the flow-passage of the honeycomb structure within the temperature range of 40.degree.-800.degree. C. A cordierite honeycomb-structural body, wherein a distribution of diameters of pores, relative to a total volume of pores having a diameter of 0.5-5 .mu.m is not less than 40% and the total volume of pores having a diameter of not smaller than 10 .mu.m is not more than 30% based on the total pore volume in the body. The body has excellent coatability and thermal shock resistance after coating.