CHEMOMECHANICAL MANUFACTURE OF FUNCTIONAL COLLOIDS

A method for producing a functional colloid during which particles are reactively fragmented in a mechanical manner in a dispersant in the presence of a modifying agent so that the modifying agent is chemically bound, at least in part, to the fragmented colloid particles.

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

Nanoscale corundum powders are obtained by first producing an Al₂O₃ precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al₂O₃ precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al₂O₃ precursor 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.

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

Nanoscale corundum powders are obtained by first producing an Al 2 O 3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al 2 O 3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al 2 O 3 precursor 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.

Chemomechanical production of functional colloids

A method for producing a functional colloid during which particles are reactively fragmented in a mechanical manner in a dispersant in the presence of a modifying agent so that the modifying agent is chemically bound, at least in part, to the fragmented colloid particles.

Chemomechanical production of functional colloids

A method for producing a functional colloid during which particles are reactively fragmented in a mechanical manner in a dispersant in the presence of a modifying agent so that the modifying agent is chemically bound, at least in part, to the fragmented colloid particles.

Chemomechanical manufacture of functional colloids

The invention relates to a method for producing a functional colloid during which particles are reactively fragmented in a mechanical manner in a dispersant in the presence of a modifying agent so that the modifying agent is chemically bound, at least in part, to the fragmented colloid particles.

Chemo-mechanical surface modification of particles

Beschrieben wird ein Verfahren zur chemomechanischen Oberflächenmodifizierung von Partikeln, bei dem Partikel in einem Dispergiermittel in Anwesenheit von einem oder mehreren Modifizierungsmitteln mechanisch beansprucht werden, wobei mindestens ein Modifizierungsmittel zumindest teilweise an die mechanisch beanspruchten Partikel chemisch gebunden wird. Disclosed is a method of chemomechanical surface modification of particles wherein particles are mechanically stressed in a dispersant in the presence of one or more modifiers wherein at least one modifier is at least partially chemically bound to the mechanically stressed particles.

Nanoscale corundum powder, sintered bodies made therefrom and process for their production

Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcinated at temperatures of 700 to 975 DEG C and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures ≤ 1200 DEG C to produce compacts or components of multiple layer systems.

Chemomechanical production of functional colloids.

Det beskrives en fremgangsmåte for fremstilling av et funksjonelt kolloid, hvor partikler i et dispergeirngsmiddel mekanisk reaktivknuses i nærvær av et modifiseringsmiddel, slik at modifiseirngsmidlet minst delvis bindes kjemisk til de knuste kolloidpartiklene.

Chemomechanical manufacture of functional colloids

Chemomechanical manufacture of functional colloids

THIS INVENTION RELATES TO A METHOD FOR PRODUCING A FUNCTIONAL COLLOID DURING WHICH PARTICLES ARE REACTIVELY FRAGMENTED IN A MECHANICAL MANNER IN A DISPERSANT IN THE PRESENCE OF A MODIFYING AGENT SO THAT THE MODIFYING AGENT IS CHEMICALLY BOUND, AT LEAST IN PART, TO THE FRAGMENTED COLLOID PARTICLES.