| 摘要 |
<p>The suitability for use of a porous ceramic body having a three-dimensionally crosslinked structure with mutually connected open cells, especially for filter purposes, is substantially restricted by its surface sensitivity. The sensitivity is improved by application of a ceramic layer. A process for partial coating of the surface of a porous ceramic body is characterised in that an absorbent sheet-like material is coated on at least one side with a thin layer of a ceramic slip, is placed with the side containing the ceramic slips on the surface, which is to be reinforced and/or sealed, of the unfired ceramic body, dried and fired together with the ceramic body. The process is advantageously used for the manufacture of electrically conductive contacts in the regeneration of filters for the purification of the exhaust gases from diesel engines by electric resistance heating and/or ignition.</p> |
