Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Filofteia-Laura Toma

Lutz-Michael Berger

Tobias Naumann

Stefan Langner

Carl Christoph Stahr

Richard Trache

The disclosure provides a method of producing thermally sprayed AlOcoatings having a high content of corundum without any property-reducing additives. The coatings may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. The thermally sprayed AlOcoatings have a porosity of no more than 19%, and a high content of &#x3b1;-AlO(content of corundum) of at least 72% by volume. The coatings have a specific electrical resistance of &#x3e;1&#xb7;10Ohms&#xb7;cm, and a purity of &#x3e;97%. The production of said coatings is carried out utilizing aqueous or alcoholic suspensions made from substantially pure &#x3b1;-AlO, having a grain size of &#x3e;100 nm by thermal spraying.

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Dresden, Germany

Filofteia-Laura Toma