| abstract |
The improved catalyzed soot filter consists of a porous ceramic having an amorphous catalyst phase consisting of an alkali containing oxide having Si, Al or a combination thereof on at least part of the porous ceramic. The improved catalyzed soot filter contacts a porous ceramic such as mullite, silicon carbide or cordierite with an alkali containing compound that is a silicate, aluminate or alumino-silicate, and an amorphous catalyst phase that is fused onto at least a portion of the porous ceramic. It may be formed by heating to a temperature sufficient to form a. |