Degussa Aktiengesellschaft

Evonik Degussa Gmbh

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

Evonik Operations Gmbh

Stefan Heberer

Stipan Katusic

Markus Pridoehl

Guido Zimmermann

Guenther Michael

Michael Kraemer

Edwin Staab

Michael Kroell

Michael Kröll

Wolfgang Lortz

Stephan Wieber

Günther Michael

Peter Kress

Günter Schmitt

Rainer Hahn

Ulrich Fischer

Michael Hagemann

Ralph Brandes

Daniel Neß

Andreas Hartwig

Daniel Ness

Can Metehan Turhan

Matthias Popp

Heiko Gottfried

Berthold Trageser

Ruediger Mertsch

Jana Kolbe

Katharina Dauth

Thomas Kowalik

Monika Sebald

Oliver Schorsch

Erwin Born

Michael Krämer

Robert Maier

Simone Jetton

Frans De Peuter

Heike Muehlenweg

Jennifer Schrantz

Michael Gerhard Hagemann

The invention relates to the use of a nanoparticle composition as a heat transfer fluid in battery or other electrical equipment systems. The electrical equipment can be in particular electric batteries, electric motors, electric vehicle transmissions, electric transformers, electric capacitors, fluid-filled transmission lines, fluid-filled power cables, computers and power electronics such as electric power converters.

Use of nanoparticle compositions as heat transfer fluids in battery or other electrical equipment systems

Aqueous cerium oxide dispersion Aqueous cerium oxide dispersion, containing 5 to 60% by weight cerium oxide. It can be used to polish SiOin the semiconductor industry.

Aqueous cerium oxide dispersion

The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Curable bonded assemblies capable of being dissociated

Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate groups at a depth of about 5 nm in a region close to the surface of from 0 to 30% by area, a content of cerium oxide calculated as CeOand based on the powder of at least 99.5% by weight and a content of organic and inorganic carbon of from 0.01 to 0.3% by weight. A dispersion containing this powder.

Cerium oxide powder and cerium oxide dispersion

The present invention provides a dispersion, which contains nano-sized zinc oxide particles, a coating preparation containing the dispersion, a process for the production of the dispersion, and a coating preparation containing the dispersion, and a use of the coating preparation.

Dispersion and coating preparation containing nanoscale zinc oxide

A dispersion of pyrogenically produced cerium oxide, which does not contain any particles larger than 1 &#x3bc;m, is produced by dispersing a pyrogenically produced cerium oxide in water by means of a dissolver, centrifuging it, separating the supernatant from the bottom product, and again dispersing the supernatant by means of ultrasound. The dispersion can be used for chemical-mechanical polishing (CMP).

Dispersion of pyrogenically produced cerium oxide

Polycrystalline cerium oxide powder in the form of aggregates of primary particles with a specific surface of between 70 and 150 m/g, an average primary particle diameter of between 5 and 20 nm and an average, projected aggregate diameter of between 20 and 100 nm. It is produced in that an aerosol is reacted in a flame obtained from a hydrogen-containing combustible gas and primary air and the solid obtained is then separated from the gaseous substances.

Cerium oxide powder

An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m /g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).

Dispersion containing pyrogenically manufactured abrasive particles with superparamagnetic domains

Growing community of inventors

Gelnhausen, Germany

Stefan Heberer