Properties of La beta-Al2O3

La beta-Al2O3 solid electrolyte was synthesized directly and its microstruc ture was determined by XRD and TEM techniques. The conductivity was measure d via AC impedance spectroscopy. The electronic conductivity of La beta-Al2 O3 solid electrolyte at relatively high temperatures (773 K less than or eq ual to T less than or equal to 1173 K) was determined with the Wagner polar ization method. Based on these data, the dependence of the conductivity of La beta-Al2O3 upon the temperature and the dopant concentration in the elec trolytes was studied. The electronic transference number was also calculate d. (C) 1998 Published by Elsevier Science B.V. All rights reserved.