Using (СeO₂)_1-x(Y₂O₃)_x (x = 0.10, 0.15 and 0.20) nanopowders obtained by co-precipitation of metal hydroxides with elements of cryotechnology, and consolidated using the SPS method, intermediate-temperature solid electrolytes with an appropriate composition were obtained; (the average size of CSR was 48–62 nm, ρ_rel – 83–93%). The dependence of the phase composition, microstructure and electrotransport properties of the samples obtained on Y₂O₃ content and consolidation conditions was established. It was shown that the solid solution (CeO₂)_0.90(Y₂O₃)_0.10 had the highest ionic conductivity, at 550 °C, in the СeO₂–Y₂O₃ system. It was established that SPS is a more efficient method of obtaining nanocrystalline solid electrolytes for IT-SOFCs, in comparison with conventional approaches.