The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2006
Filed:
Jul. 20, 2001
Robert Drumm, Saarbruecken, DE;
Christian Goebbert, Riegelsberg, DE;
Kai Gossmann, Saarbruecken, DE;
Ralph Nonninger, Saarbruecken-Buebingen, DE;
Helmut Schmidt, Saarbruecken-Guedingen, DE;
Robert Drumm, Saarbruecken, DE;
Christian Goebbert, Riegelsberg, DE;
Kai Gossmann, Saarbruecken, DE;
Ralph Nonninger, Saarbruecken-Buebingen, DE;
Helmut Schmidt, Saarbruecken-Guedingen, DE;
Leibniz-Institut fuer neue Materialien Gemeinnuetzige GmbH, Saarbruecken, DE;
Abstract
Nanoscale corundum powders are obtained by first producing an AlOprecursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the AlOprecursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the AlOprecursor 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.