Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2006-04-04
2006-04-04
Bos, Steven (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S122000, C423S127000, C423S627000, C501S153000, C264S624000, C264S658000
Reexamination Certificate
active
07022305
ABSTRACT:
Nanoscale corundum powders are obtained by first producing an Al2O3precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3precursor are separated off. The resulting product is calcined at temperatures of 700 to 975° C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of ≦1200° C. to produce compacts or components of multiple layer systems.
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Drumm Robert
Goebbert Christian
Gossmann Kai
Nonninger Ralph
Schmidt Helmut
Bos Steven
Hollander Law Firm, P.L.C.
Leibniz-Institut fuer neue Materialien Gemeinnuetzige GmbH
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