Abstract
Dense La 2Mo 2O 9 ceramic electrolytes were prepared with ultrafine powder by the SPS rapid sintering method. The conductivity of the specimens by SPS was much higher than those sintered by conventional process. Moreover, the unilateral alignment of rod-type grains happened in the specimens sintered by SPS at higher temperatures or for longer holding time. The anisotropy in ionic conductivity was attribute to the directional alignment of rod-type grains. The oxygen ion conductivity parallel to the direction of rod-type grains was higher than that perpendicular to the grains.
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