| abstract |
ThenThe invention relates to a filter for removing particles fromna gas stream, in particular of soot particles from an exhaust gas streamnan internal combustion engine, with a filter bodyna ceramic filter substrate, wherein the filter substrate with anporousnProtective layer (46, 48) coated from a coating materialnis, characterized in that the coating material is anAdmixture of from 1 to 20% by weight of at least one compound of an elementnthe 2nd main group, preferably an oxide of an element ofn2nd main group containsnand in the ceramic filter substrate contained cracks (44) partly withnfilled the coating materialnare. Furthermore, the invention relates to a process for the preparationna filter in which the coating material for the porous protective layern(46, 48) applied to the sintered, ceramic filter substratenbecomes, at least one connection of an element of the 2nd main groupnis added, optionally further in the protective layer (46,n48) contained substances and the porous protective layern(46, 48) is fixed. |