Spark-Plasma-Sintering (SPS) has been applied to fine BaTiO3 powder (several nanometers) prepared by a sol-crystal method. The starting powder was densified to more than 95% of the theoretical X-ray density, and the obtained SPS pellets had an average grain size of less than 1 mum, owning to the relatively low sintering temperature (900-1000 degreesC) and short sintering period of ca. 3 min. The room temperature permittivity at 1 kHz for SPS samples sintered at 1000 degreesC is ca. 10,000. This high room temperature permittivity value is attributed to electrical inhomogeneities within pellets; a resistive surface layer covers the inner pellet core that consists of oxygen-deficient BaTiO3. The reduced pellet core is characteristic of SPS pellets formed from powders that contain small amounts of residual organic matter.