Leibniz-institut Fuer Neue Materialien Gemeinnuetzige Gmbh

Institut F&uuml;r Neue Materialien Gem. Gmbh

Christian Goebbert

Helmut Schmidt

Ralph Nonninger

Robert Drumm

Stefan Sepeur

Kai Gossmann

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&#xb0; C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of &#x2266;1200&#xb0; C. to produce compacts or components of multiple layer systems.

Nanoscale corundum powders, sintered compacts produced from these powders and method for producing the same

Suspensions and powders based on indium tin oxide are prepared by a method in which indium tin oxide precursors are precipitated from solutions in one or more solvents in the presence of one or more surface-modifying components, the solvent(s) are removed from the precipitate, which is then calcined, one or more surface-modifying components and one or more solvents are added, the mixture is comminuted or dispersed to form a suspension, and the liquid components are separated from the suspension to give a powder. The powder may be converted into a moulding by a shaping process. The materials prepared by this method are especially suitable as coating materials for use in microelectronics and optoelectronics.

Method for preparing suspensions and powders based in indium tin oxide and the use thereof

Growing community of inventors

Riegelsberg, Germany

Christian Goebbert