TRANSPORT-PROPERTIES OF MATERIALS WITH THE SCHEELITE STRUCTURE

Materials with the scheelite structure exhibit mixed ionic and electro nic conductivity, and are of interest as oxidation catalysts. Scheelit e materials are also possible candidates for use as electrolytes or ca thode materials in solid oxide fuel cells. Our work on the scheelite s ystem, based on BiVO4, shows that both ionic and electronic components of the conductivity can be modified by doping this material. Both A a nd B site doping have been investigated. The A cation was replaced by Ca, Ce and Zr, and the B site by Mo.