Ceramic articles having a nonporous core and porous outer layer

Details Ceramic articles having a nonporous core and porous outer layer Ceramic articles having a nonporous core and porous outer layer

C - Chemistry, Metallurgy

04

B

149/5, 117/89

C04B 35/00 (2006.01) B01J 37/02 (2006.01) C04B 35/622 (2006.01) C04B 38/04 (2006.01) C12N 11/14 (2006.01) G01N 30/52 (2006.01)

Patent

CA 1231293

Abstract This invention relates to high technology ceramics. The ceramic articles of this invention are fired, non-vitreous, monolithic, non-fused ceramic articles in various forms. Articles capable of being filled or infiltrated with certain substances in a controlled geometry and in controlled amounts to render the articles useful for special applications, e.g., catalytic, reinforcing, are rare. The articles of this invention exhibit a uniform, porous sheath and a core. The porous sheath or outer layer of the articles can be filled with various infiltrates, e.g., catalysts, in order to provide the articles with useful properties. The articles can be prepared by treating fired ceramic articles with a leachant, e.g, hydrofluoric acid or a precursor thereof.

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