Saint-gobain Centre De Recherches Et D'etudes Europeen

Yves Marcel Leon Boussant-Roux

Michel Gaubil

Stephen D Hartline

Jostein Mosby

Ana-Maria Popa

Sjur Vidar Velken

The invention relates to a process for fabrication of a porous refractory ceramic product made from SiC, by heat treatment and sintering at high temperature, starting from a fraction of fine particles of SiC and from a fraction of larger-sized particles of SiC, said process being characterized in that, in a step preliminary to the heat treatment and to the sintering at high temperature, the finest particles of SiC are agglomerated then, in a second step, the granules thus obtained are added to the SiC powder with particles of larger size. The invention also relates to a porous body made from recrystallized SiC in an essentially &#x3b1; form, in particular a particulate filter for automobile application, obtained by such a process.

Method for making a SiC based ceramic porous body

The invention concerns a refractory product comprising more than 85% of zirconia (ZrO), characterized in that it comprises in wt. % with respect to oxides: ZrO&#x3e;92%, SiO: 2 to 8%, NaO: 0.12 to 1%, AlO: 0.2 to 2%, 0.5%&#x2266;YO+CaO&#x2266;2.6%, with the proviso that YO: 0.3 to 2% and that CaO: 0.5 to 1.93%.

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Montfavet, France

Yves Marcel Leon Boussant-Roux