| 摘要 |
<p>The present invention provides a catalyst-loaded ceramic filter that is made of a ceramic material capable of directly supporting a catalyst component thereon, and is capable of providing early activation of the catalyst with a low coefficient of thermal expansion and light weight, without compromising the high porosity of the filter substrate. According to the present invention, a catalyst-loaded ceramic filter is made of a ceramic material of which one or more kinds of element among the constituent elements thereof is substituted with element other than the constituent elements, for example a ceramic material with a part of Si or other elements included in cordierite is substituted with W or Co, as a filter substrate of honeycomb structure having a number of cells separated by porous walls, and supporting a catalyst such as a noble metal directly on the W. This constitution has advantages that there occurs no increase in the pressure loss, coefficient of thermal expansion or weight due to the formation of a coating layer, and that the heat capacity remains low.</p> |
