Gas sensing is one of the main interests in our research.
The research topics deal with materials and mechanism, applications and
concepts or novel sensing principles. Furthermore, we work on all aspects of the
process chain for sensor manufacturing and sensors characterization.
A special focus is given to chemical sensors comprising ceramic functional
materials. Here, we are dealing with thick- or thin-film technology and ceramic
multilayer technology (HTCC and LTCC).
Beside comprehensive sensor characterization in synthetic or real exhaust
with versatile electrical or electrochemical methods, we are modelling and
simulating material parameters as well as entire sensor elements.
In the field of gas sensing, we have available the complete process chain
from material synthesis up to characterization. “Sensor Prototyping” is our
- Material synthesis (powder synthesis by mixed-oxide or wet-chemical routes,
powder processing to screen-printable pastes)
- Transducer technology (ceramic multilayers in LTCC or HTCC, isostatic
pressing, laser patterning)
- Thick- and thin-film technology (screen-printing, aerosol deposition,
photolithography, thermal and e-beam evaporation)
- Sensor characterization in conditions close to reality (several test benches
for defined dosing of all (exhaust) components like N2,
O2, CO2, H2O, CO, NO, NO2,
hydrocarbons, H2, NH3, formaldehyde, SO2 and others in
heated chambers or for self-heated sensors, downstream analytics (CLD, FID,
NDIR, GC, FTIR usw.))
- Materialcharakterisierung: Rasterelektronenmikroskop (REM) mit
Elementanalyse (EDX) und variablem Druck (ESEM)
The gas sensitive functional layers are investigated with regard to
sensitivity and cross-sensitivities, response times or poisoning. We use
classical amperometric, resistive or potentiometric methods as well as impedance
spectroscopy up to 1600 °C in defined atmospheres.
The main need for a sensor
development (targeted to highly selective and –sensitive devices e.g. for
on-board-diagnostic purposes in automotive applications) is a deep understanding
of the basic mechanism. Therefore, material characterization data are evaluated
and can be used for theoretical models of the sensing behavior.
Prof. Dr.-Ing. Ralf Moos, Phone: +49 (0)921 55 7400,
Dr.-Ing. Gunter Hagen, Phone:: +49 (0)921 55 7406,
Dr.-Ing. Daniela Schönauer-Kamin, Telefon: +49 (0)921 55 7458,