THE ELECTRICAL-CONDUCTIVITY OF YTTRIA-STABILIZED ZIRCONIA PREPARED BYPRECIPITATION FROM INORGANIC AQUEOUS-SOLUTIONS

The electrical conductivity of yttria stabilized zirconia (YSZ), prepa red by precipitation from aqueous solutions of inorganic precursors, w as measured as a function of composition, temperature of annealing pri or to conductivity measurements (900 degrees C-1700 degrees C), and te mperature of measurement (500 degrees C-900 degrees C). A comparison i s made with the more dense YSZ prepared by the dry powder method: the conductivites are very near when the same high annealing temperatures are applied. The considerable increase in the conductivity attained by raising the annealing temperature of the precipitated material is sug gested to be largely due to an increase in density. The effect of othe r factors is considered.