Al2O3 and 0.25wt% MgO-doped Al2O3 powders were made from the alcohol solution of Al(NO3)3.9H2O and Mg(NO3)2.6H2O by spray pyrolysis method. Each powder was prepared at 900 and 100$0^{circ}C$. Powders prepared at 90$0^{circ}C$ were amorphous phase, but prepared at 100$0^{circ}C$ wre mainly ${gamma}$-Al2O3 crystalline form. Particle size of the MgO-doped Al2O3 powders was in the range of 0.2-2${mu}{ extrm}{m}$, but undooped powders shwoed comparatively wider range of particle size. All the powders prepared at 900 and 100$0^{circ}C$ were transformed to $alpha$-Al2O3 crystalline form by calcination at 110$0^{circ}C$ for 1hr. Each powder was sintered at 1600, 1650 and 1$700^{circ}C$ for 2hrs. MgO-doped Al2O3 body sintering at 1$650^{circ}C$ showed 99% of relative density but undooped Al2O3 showed 95% of relative density, even sintered at higher temperature of 1$700^{circ}C$.