SPARK-PLASMA SINTERING OF INTERCONNECTOR MATERIAL (La_(0.9)Sr_(0.1))CrO_3

摘要

We have applied spark-plasma sintering (SPS) method to intercon-nector material (La_(0.9)Sr_(0.1))CrO_3 for obtaining dense ceramics. Fine starting powder (0.2 μm) was densified to ca. 97% of the theoretical X-ray density with much shorter sintering period (5 min) at relatively lower sintering temperature (ca. 1500℃), while preserving a grain size similar to that of the starting powder. The SPS process with coarse starting powder (1 μm) or conventional sintering in a muffle furnace required higher sintering temperature (> 1600℃) for preparing dense ceramics. Electrical conductivity of the SPS ceramics was 15 S*cm~(-1) at 1000℃ in air, which was comparable to previously reported values for well-sintered ceramics.