Process for producing porous, through-flowable mouldings...

Details Process for producing porous, through-flowable mouldings... Process for producing porous, through-flowable mouldings...

C - Chemistry, Metallurgy

04

B

C04B 35/56 (2006.01) B01D 39/20 (2006.01) C04B 35/573 (2006.01) C04B 35/65 (2006.01) C04B 38/00 (2006.01) F01N 3/02 (2006.01) F02B 3/06 (2006.01)

Patent

CA 2119025

ABSTRACT A process is disclosed for producing porous, through-flowable mouldings made of silicium carbide having low electric re- sistance, as well as a diesel soot filtering element produced according to this process. An appropriate granulated powder mix, composed for example of coking organic binder, silicium and a nitrogen compound, is moulded into a green body, is coked in an inert gas atmosphere or under vacuum at a temperature between 600° and 1000 °C, then silicated at 1400° to 2000 °C. If the pow- der mix contains no nitrogen compounds, the green body is silicated in a nitrogen-containing atmosphere. Advantageous embodi- ments of the invention concern individual details of the powder mix preparation. This process makes it possible to produce a die- sel soot filtering element that can be electrically heated up and regenerated.

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