Umicore Ag & Co Kg

Siemens Aktiengesellschaft

Robert Boschgmbh

Continental Automotive Gmbh

Siemens Energy Global Gmbh & Co. Kg

Eckart Gmbh

Cpt Group Gmbh

Vishay Electronic Gmbh

Vitesco Technologies Gmbh

Ceramtec Gmbh

Yageo Nexensos Gmbh

Ralf Moos

Maximilian Fleischer

Karlheinz Wienand

Willibald Reitmeier

Martin Votsmeier

Martin Roesch

Tjalf Pirk

Stefan Dietmann

Gunter Hagen

Ralph Schneider

Denny Schädlich

Hans-Jürgen Schreiner

Kerstin Wiesner

Christine Engel

Matsvei Zinkevich

Kerstin Wiesner-Fleischer

Michael Butzin

Katharina Burger

Véronique Poulain

Markus Dietrich

Markus Hien

Sophie Schuurman

Sebastian Reiss

Diana Biskupski

Daniela Schönauer

Olga Isakin

Kerstin Schindler

Monika Willert-Porada

Martin Turwitt

Jaroslaw Kita

Dominik Hanft

Martin Hämmerle

Gregor Beulertz

Christian Münch

Tobias Schmidt

Daniela Schoenauer-Kamin

Michaela Schubert

Joroslaw Kita

Andreas Engelbrecht

Sven Wiegaertner

Gerhard Fischerauer

Michael Schubert

Tanja Einhellinger-müller

Daniela SCHÖNAUER-Kamin

Sven WIEGÄRTNER

Composites comprising an exfoliated graphite support material having a degree of graphitization g in an range of 50 to 93%, obtained by XRD Rietveld analysis, which is coated with ZnO nanoparticles. These composites are produced by three different methods: A) (syn) the method comprises the following consecutive steps: i) a Zn(II)salt is dissolved in a solvent ii) graphite and a base are added simultaneously iii) the mixture is stirred under impact of ultrasound iv) the solvent is removed from the suspension or B) (pre) the method comprises the following consecutive steps: i) graphite is suspended in a solvent and exfoliated via impact of ultrasound ii) a Zn(II)salt and a base are added simultaneously forming nano-ZnO particles iii) the mixture is stirred iv) the solvent is removed from the suspension or C) (post) the method comprises the following steps: i) a Zn(II)salt and a base are mixed in a solvent in a first reactor forming nano-ZnO particles ii) graphite is exfoliated via impact of ultrasound in a second reactor iii) both suspensions of i) and ii) are mixed together iv) after step iii) the solvent is removed from the suspension. These coated composites may be tempered in a further step and again coated and again tempered.

ZnO nanoparticle coated exfoliated graphite composite, method of producing composite and use in Li-ion battery

Various embodiments include an electrolysis method comprising: applying a pulsed voltage or a pulsed current between an anode and a cathode; repeatedly measuring a respective current OCP at the cathode in a zero-current state relative to a reference system; and controlling the pulsed voltage or the pulsed current so a working potential of the cathode in the current-carrying state with respect to the reference system has a defined progression relative to the respective current OCP. The defined progression includes a first phase at a cathodic level and a second phase at an anodic level.

Pulsed electrolysis with reference to the open circuit voltage

The present invention relates to a method of producing a negative temperature coefficient resistor (NTCR) sensor, the method comprising the steps of: providing a mixture comprising uncalcined powder and a carrier gas in an aerosol-producing unit, with the uncalcined powder comprising metal oxide components; forming an aerosol from said mixture and said carrier gas and accelerating said aerosol in a vacuum towards a substrate arranged in a deposition chamber; forming a film of the uncalcined powder of said mixture on said substrate; and transforming the film into a layer of spinel-based material by applying a heat treatment step.

Method of producing a NTCR sensor

Various embodiments include a catalyst measuring system for on-board diagnostics and for determining the aging of an SCR catalytic converter for a vehicle comprising: a processor; an SCR catalytic converter for purifying exhaust gas of the vehicle; a high-frequency sensor for determining the ammonia loading of the SCR catalytic converter; a NOx sensor for sensing the NOx concentration downstream of the SCR catalytic converter; and an ammonia dosing system for injecting ammonia into an exhaust system of the vehicle. The control device instructs the ammonia dosing system to inject ammonia selectively into the exhaust system at a plurality of different dosing rates. The control device evaluates data received from the NOx sensor and of the high-frequency sensor to calculate the ammonia dosing rate.

On-board diagnostics for an exhaust gas catalytic converter and detection of aging

A method for producing a galvanic element includes applying a first electrode to a substrate, applying a separator to the first electrode, and applying a second electrode to the separator. At least one of the electrodes is applied in the form of a composite electrode using an aerosol separation method.

Method for producing a galvanic element and galvanic element

The invention is directed to a method for determining the state of aging of a catalytic converter (). The disclosed method functions in a non-contacting manner as resonances formed when the catalytic converter () located in a housing is excited with high-frequency electromagnetic waves are analyzed.

Method for detecting the degree of aging of catalytic converters

A sensor for detecting oxidizable gases may comprise a catalytically inactive surface and a catalytically active surface on opposite sides of a sensor element and a thermal element running through the sensor element to connect the two surfaces, with a device for measuring a thermoelectric voltage between the catalytically active surface and the inactive surface as a measure of the difference in temperature and therefore the gas concentration. The sensor may include a hot plate mounted on a base carrier by means of narrow arms, wherein the thermal element includes at least one via extending through the hot plate and connecting the two surfaces to one another, and in the region of which the thermoelectric voltage is measured.

Sensor for detecting oxidizable gases

The present invention relates to a process for determining the state of an exhaust-gas purification device. The exhaust-gas purification device is one which can store gas and/or particles. By means of the proposed process, it is for example possible for the loading state of the exhaust-gas aftertreatment system, for example the oxygen storage state of a catalytic converter which is provided with an oxygen-storing material, such as for example a three-way catalytic converter, to be analyzed. The present process operates contactlessly through the analysis of resonances which arise upon the excitation of the catalytic converter using the purification device as microwave cavity resonator.

Method for condition determination of an exhaust-gas purification system

A combined gas sensor includes a first electrode and a second electrode, wherein the first and second electrodes are connected via an ion-conducting material. The first electrode is covered, in part, by a first catalytically active material. Further, a resistive gas sensor formed by a third electrode is arranged such that the third electrode is in direct contact with the first catalytic material and is not in direct contact with the first electrode.

Gas sensor

Growing community of inventors

Bayreuth, Germany

Ralf Moos