SEM images of the SPS sintered samples.
XRD patterns of starting powders and SPS sintered samples.
The dependence of grain size on annealing temperature for SPS400, SPS500, and SPS600. The open star represents the grain size of the starting powders (4.9 nm).
TEM images of the as-sintered SPS400 and SPS600 bulks.
The dependence of , , and on annealing temperature under forming gas. The values are calculated from full density. The annealing time is 1 hour and the ambience is forming gas (93%Ar+7%).
The dependence of the compact density and oxygen percent on .
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