Thermal, electrical and electrocatalytical properties of LaxSr1-xTiO3, where x=0.1, 0.2, 0.3, 0.35, and 0.4, perovskite compositions are studied in relation to their potential use as solid oxide fuel cell (SOFC) anode materials. An emphasis is made on the effect of oxidation-reduction cycling on these properties. Depending on the dopant amount, x, and the oxygen partial pressure, LaxSr1-xTiO3 possesses an electrical conductivity on the order of 0.01-500 S/cm at 800-1000 degrees C. The thermal expansion of LaxSr1-xTiO3 is close to that of yttria-stabilized zirconia (YSZ). No significant chemical expansion or contraction of LaxSr1-xTiO3 with x
Revised: January 14, 2003 |
Published: July 1, 2002
Citation
Marina O.A., N.L. Canfield, and J.W. Stevenson. 2002.Thermal, Electrical, and Electrocatalytical Properties of Lanthanum-Doped Strontium Titanate.Solid State Ionics 149, no. 1-2:21-28.PNNL-SA-35369.