Información Gráfica

OBTAINING YBSCSZ SUBSTRATES BY AQUEOUS TAPE CASTING FOR SOFC APPLICATIONS
2013-EUROMAT-SEVILLA, SPAIN 2

- Ytterbium Scandia- Stabilized Zirconia (YbScSZ) suspensions were optimized using zeta-potential and viscosity measurements. 
 
- Maximum packing density is desired.
 
- The substrates were obtained by tape casting.
 
- The single cell was obtained by warm-pressed lamination of the green tapes.
 
- The sintering process was studied using a high-temperature microscope.

ELECTRICAL PERFORMANCE OF CERMET ELECTRODES FOR GAS SENSORS
2013-EUROMAT-SEVILLA, SPAIN 1

The aim of this work is to optimize the electrical behavior of electrodes for gas sensors based in solid ceramic electrolyte.

For this purpose, YSZ substrates have been produced using a tape-casting process. Subsequently, Pt-YSZ cermet electrodes have been printed onto these substrates by screen-printing techniques. Several configurations have been investigated by tailoring the screen-printing pastes formulation.

Morphological and electrochemical characterizations have been carried out in order to correlate the results with the electrode structure.

A LOW TEMPERATURE COFIRED CERAMIC (LTCC) TECHNOLOGY PLATFORM FOR HETEROGENEOUS INTEGRATED SYSTEMS
2011-CDE-PALMA DE MALLORCA, SPAIN

QUANTITATIVE MODEL OF THE BEHAVIOR OF THE LIMITING CURRENT OXYGEN SENSORS
2009-EUROSENSORS-LAUSANNE, SWITZERLAND

A physico-chemical model of the I(V) response of amperometric oxygen sensors based in ion conduction is proposed. Although the qualitative behavior of these devices is well known, there is a lack of a quantitave description of the response of the sensors in their normal operation conditions.

The model focuses on diffusion across a porous layer and minimization of the oxygen-ion electrochemical potential in steady state. It provides an analytical expression describing the current-voltage dependence in terms of oxygen diffusivity, ionic conductivity, temperature and geometrical parameters.

Experimental measurements are used to validate the model.

A MONOLITHIC MICROCERAMIC TECHNOLOGY FOR NANOSTRUCTURED MATERIAL SENSORS.
2009-EMRS-STRASBOURG, FRANCE

We present a multilayer co-fired ceramic technology for the development of alumina-based gas sensors substrates.

These substrates include embedded heater and thermo-resistance as well as electrodes in 2x2mm dice. Substrate thickness is less than 0.2 mm. Substrate technology allows obtaining smooth surface at nanometer level.

As example, we have studied the growth of nanowires on different ceramic surfaces to take advantage of the nanoscale phenomena.