Institut Francais Du Pe'trole

Fabienne Pourchet

Philippe Courty

Jean-Baptiste Dementhon

Jean Pierre Joulin

A monolithic honeycomb-type structure useful in particular as a particle filter for exhaust gases from diesel engines has a number of passages that empty into the end faces of said monolith, but are alternately open and sealed. The monolith consists of a porous refractory material that comprises: 70 to 97% by mass of &agr; and/or &bgr; crystallographic-type silicon carbide that has at least one particle size and preferably at least two particle sizes, and 3 to 30% by mass of at least one bonding ceramic phase in the form of a micronic powder or particles that are obtained by atomization, comprising at least one simple oxide, for example, B O , Al O , SiO , MgO, K O, Li O, Na O, CaO, BaO, TiO, ZrO and Fe O and/or at least one mixed oxide, for example, the alkaline aluminosilicates (of Li, Na, or K) or alkaline-earth aluminosilicates (of Mg, Ca, Sr or Ba), clays, bentonite, feldspars or other natural silico-aluminous materials. The production of the monolith comprises a calcination stage under an oxygen-containing atmosphere at a temperature up to 1650&deg; C., but less than 1550&deg; C.

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Salindres, France

Fabienne Pourchet