W.c. Heraeus Gmbh

W.c. Heraeus Gmbh & Co Kg

Bundesanstalt Fur Materialforschung Und - Prufung

Christina Modes

Frieder Gora

Joachim Schmidt

Hans-Georg Burckhardt

Karlheinz Guldner

Jurgen Dehoust

Sybille Kemmler-Sack

Wolfram Wersing

Gabriele Preu

Ulrich Stroder

Markus Eberstein

Karl-Heinz Guldner

Inge Blanke

Andrea Kramer

Jochen-Werner K Burgsdorff

Ulrich Fritz

Oliver Dernovsek

Marion Gemeinert

Heinrich Meyer

Wolfgang Arno Schiller

Rainer Kiemel

The invention relates to a glass ceramic mass containing at least one oxide ceramic containing barium, titanium and at least one rare earth metal Rek; and at least one glass material containing at least one oxide with boron, at least one oxide with silicon and at least one oxide with at least one bivalent metal Me2+. The glass ceramic mass is characterised in that the glass material contains at least one oxide with bismuth, especially bismuth trioxide. The oxide ceramic is especially a microwave ceramic of formula BaRek2Ti4O12, Rek being neodymium or samarium. The composition of the oxide ceramic remains essentially constant during the sintering of the glass ceramic, enabling the material properties of the glass ceramic mass, such as permittivity (20&#x2013;80), quality (800&#x2013;5000) and Tkf (&#xb1;20 ppm/K) to be specifically predetermined. The glass ceramic mass is characterised by a densification temperature of under 910&#xb0; C. and can is therefore suitable for use in LTCC (low temperature cofired ceramics) technology, for integrating a passive electrical component in the volume of a multilayered ceramic body. Silver in particular can be used as an electroconductive material in this case.

Glass ceramic mass and use thereof

A resistor composition comprising a pyrochlore-related oxide a glass frit and, anorthite as a finely-divided filler. The resistor composition exhibits high tolerance in respect to firing temperatures. Thick film resistors obtained therefrom by firing on, for example, aluminum oxide substrates, have relatively uniform resistance values, even with inconsistent firing conditions, and have high stability of resistance following laser trimming.

Resistor composition for producing thick film resistors

Resistor composition to produce thick film resistors, preferably the resistor films in sensors for temperature measurement, includes glass frit and an oxide which is at least one of CaCu.sub.3 Ru.sub.4 O.sub.12 and LaCu.sub.3 Ru.sub.4 O.sub.12.

Resistor composition and its use

Electrically conductive oxides of the pyrochlore family based on copper and/or silver, lead, bismuth, and ruthenium, characterized by the formula M.sub.x M'.sub.y (Pb,Bi).sub.2-x-y Ru.sub.2 O.sub.7-z, wherein M=copper and/or silver, M'=calcium, strontium, and/or barium, 0.ltoreq.x.ltoreq.0.6, 0.1.ltoreq.y.ltoreq.1.0, and 0.1.ltoreq.z.ltoreq.1.0.

Oxides of the pyrochlore family and electrically resistant materials

Laminated electrodes and a method for their preparation are described, these electrodes being composed of electrically conductive plastic having catalytic particles, composed of a catalyst deposited on supporting particles, pressed partially into the plastic. They can be used as oxygen anodes, for example in the electrolytic recovery of metal from aqueous solutions.

Laminated electrode the use thereof

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Frankfurt-am-Main, Germany

Christina Modes