Chemical control over ceramic porosity using carboxylate-alumoxanes

This invention relates generally to a method for controlling the pore size, pore size distribution and porosity of aluminum-oxide based ceramics through the choice of substituents on carboxylate-alumoxanes and aluminum-oxide nanoparticles The method allows for the formation of intra-granular pores i...

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Bibliographische Detailangaben
Hauptverfasser:	WIESNER, MARK ROBERT, JONES, CHRISTOPHER DANIEL, CALLENDER, RHONDA LYNN, BARRON, ANDREW ROSS, BAILEY, DIANE AMY
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CONCRETE GLASS INORGANIC CHEMISTRY JOINING GLASS TO GLASS OR OTHER MATERIALS LIME, MAGNESIA METALLURGY MINERAL OR SLAG WOOL PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	This invention relates generally to a method for controlling the pore size, pore size distribution and porosity of aluminum-oxide based ceramics through the choice of substituents on carboxylate-alumoxanes and aluminum-oxide nanoparticles The method allows for the formation of intra-granular pores in the nanometer range to be created in alumina and aluminum oxide ceramic bodies. The control over pore size and pore size distribution is accomplished through the use of different chemical substituents on the carboxylate-alumoxanes and aluminum-oxide nanoparticles. The size and distribution of pores within the alumina-oxide ceramic are dependent on the identity of the carboxylate substituents. In particular the formation of intra-versus inter-granular porosity is dependent on the identity of the carboxylate substituents.