Preparing filter, useful e.g. to separate particles from a gas stream, comprises moistening the filter substrate from the ceramic material with silane, silanol and/or siloxane solution, and initiating a reaction to form silicon

摘要

Preparing filter from a ceramic filter material containing microcracks, for separating particles from a gas stream (46), comprises moistening the filter substrate from the ceramic material with a solution containing silane, silanol and/or siloxane; and initiating a reaction for forming silicon from silane, silanol and/or siloxane compounds. An independent claim is included for the filter, for separating particles, preferably soot particles from the gas stream, preferably an exhaust gas stream, which is from an internal combustion engine, comprising a filter substrate from a ceramic material containing microcracks, where the microcracks contain an agglomerate of silicon oxide unit (50) of formula (SiOx). x : not defined.