Scandium doped zirconia

Potentiometric sensors for oxygen measurement are typically formed by a layer of stabilized zirconia pressed between two porous Pt electrodes, as schematized in Figure 9.1 (Bard et al., 2008 Pasierb and Rekas, 2009). Such electrodes are in contact with the gas sample and a reference gas, respectively. A typical example is constituted by O2 sensors based on yttrium- or scandium-doped zirconias. The... 

SDZ scandium-doped zirconia (Zr02)i-x(Sc203) c YSZ yttrium-doped (stabilized) zirconia (Zr02)i- c(Y203) t ... 

An alternative approach to reduce the operating temperature is to use new electrolyte materials such as scandium doped zirconia (SeSZ), and rare earth doped ceria (RDC) which have the fluorite type stmeture, or lanthanum gallate based oxides such as (La,Sr)(Ga,Mg)03 (LSGM) with perovskite stmeture, all of which have higher ionic conductivities than YSZ. An 1 kW class SOFC stack with (La,Sr)(Ga,Mg,Co)03 electrolyte was demonstrated by the collaboration of Mitsubishi Materials Corp. and The Kansai Electric Power Co., Inc. in 2001,... 

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