Electrochemistry at Ion Conduction Microcontacts-Application to the Study of Ion Transport

Composites of Ce0.8Gd0.2O1.9 and Gd0.7Ca0.3CoO3−δ as oxygen permeable membranes for exhaust gas sensors

“…Yttria-stabilised zirconia (YSZ, 20 mol% Y) was used for the microcontact in the form of ceramic needles. Theory and experimental details of the microelectrode technique have been described at length elsewhere [9,[11][12][13]. Thus, we only present the experimental parameters and equations used for the evaluation of current-voltage curves.…”

Development of oxygen-permeable ceramic membranes for NOx-sensors

“…9 Yttria stabilised zirconia (YSZ) was used, representing an oxygen ion conductor with negligible electron conductivity under the applied conditions (microcontact tip radius ranging between 40 and 60 mm). 10 Characterisation of the electronic conductivity was carried out taking advantage of the van der Pauw 4-point-method with cylindrical specimen of 6 mm diameter and 3 mm of height, contacted by sputtered electrodes (50 A ˚of CrNi). 11 The catalytic activity of the compounds has been determined using a flow reactor, consisting of heated stainless steel and quartz tubing.…”