Max-planck-gesellschaft Zur Forderung Der Wissenschaften E.v.

Dritte Patentportfolio Beteiligungsgesellschaft Mbh &co. Kg

Drager Ag

Helmut Schubert

Christoph Kallfass

Werner Weppner

Gunter Petzow

Nils Claussen

Manfred Ruhle

Gerhard-Ludwig Schlechtriemen

Hermann Schier

Wayne Worrell

Rolf-Dieter Zehbe

The invention relates to a method for producing a composite material, to a composite material produced according to said method and to the use of said material.

Method of producing a composite material, a composite material so produced and its application

The present invention provides a mixed conducting body, wherein it consists f 98 to 25 mol % of cubic or tetragonal zirconium dioxide, 1.5 to 25 mol % of an oxide stabilizing the zirconium dioxide phase and 0.5 to 50 mol % of at least one oxide of a metal of Group Va and VIa of the Periodic System of Elements and/or titanium dioxide, as well as the usual impurities. This body is outstandingly useful as electrode material for oxygen exchange reactions.

Oxidic bodies with ionic and electronic conductivity

The present invention provides a fine-grained ceramic formed body of 0.5 to mole % rare earth oxide and 0.5 to 7 mole % MgO-containing ZrO.sub.2, wherein the cubic granules thereof are coated with Mg-Al spinel particles. The present invention also provides a process for the production of such formed bodies, wherein a ZrO.sub.2 powder alloyed with rare earth oxide, which contains small amounts of Al.sub.2 O.sub.3, is pressed and sintered in the presence of MgO at a temperature of from 1400.degree. to 1600.degree. C. and optionally subsequently tempered at a temperature of from 1200.degree. to 1350.degree. C.

High-strength and temperature-stable formed bodies of zirconium dioxide

A sensor for measuring partial pressures of oxygen with an ion-conducting lid electrolyte of zirconium dioxide as the sensor element, which is arranged between two electrodes for measuring an electrically measurable quantity, is improved so that it is usable at an operating temperature of about 200.degree. C., by providing that the zirconium dioxide as the solid electrolyte is solely in its tetragonal modification and containing an addition of about 2-3 mol % yttrium oxide.

Sensor for measuring partial pressures of gases

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Stuttgart, Germany

Helmut Schubert