The Ce0.8(Gd0.2−xSmx)O1.90 nanopowders were successfully synthesized by using a

microwave-induced combustion process taking only 0.5h in all. The phase

identification and morphology of resultant powders were investigated by XRD and

SEM. Moreover, the correlation of ionic conductivity and thermal expansion

coefficient for Ce0.8(Gd0.2−xSmx)O1.90 ceramics from microwave-induced

combustion process also was discussed. The results revealed that the bulk densities

of Ce0.8(Gd0.2−xSmx)O1.90 ceramics sintered at 1450C for 3h were all greater than

95% of that in theoretical densities. The maximum electrical conductivity (σ850C =

0.051S/cm), minimum activation energy (0.77eV) and minimum thermal expansion

coefficient (18.733ppm/C) was found for a Ce0.80Gd0.20O1.90 ceramic.

Microwave-Induced Combustion Synthesis and Ionic Conductivity of

Ce0.8(Gd0.2−xSmx)O1.90 Ceramics. Y.P.Fu: Ceramics International, 2008, 34[8],

2051-7