Carbon-clad zirconium oxide particles
AssigneeRegents of the University of Minnesota
InventorsEric F. Funkenbusch, Peter W. Carr, Douglas A. Hanggi, Thomas P. Weber
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Abstract
Carbon-clad zirconium oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of chromatographic support material is also disclosed which utilizes low pressure.
Claims10
A zirconium oxide spherule which has a diameter of about 1-500 microns and having a surface which is substantially covered by a carbon cladding.
Carbon-clad inorganic oxide spherules which are prepared by a process comprising the steps of:
- (a) placing a plurality of porous inorganic oxide spherules having a surface, a diameter of about 1-500 microns, a surface area of about 5-300 m.sup.2 /g and a pore diameter of about 20-5000 .ANG. within a reaction chamber;
- (b) elevating the temperature of the reaction chamber and reducing the pressure of the reaction chamber;
- and
- (c) introducing a vapor comprising carbon into the reaction chamber so as to thermally decompose the vapor and deposit a cladding of the carbon onto the porous spherules, substantially covering the surface of the spherules.
A porous zirconium oxide particle which has a core ZrO.sub.2 particle having a pore diameter from about 20-5000 Angstroms having a surface which is substantially covered by a carbon cladding.
Dependencies are inferred from the claim text.