In this research, alpha-Al2O3 nanopowder was successfully synthesized via a new wet chemistry (liquid phase reaction) method. Fourier Transform Infrared Spectroscopy (FTIR), Xray diffraction (XRD) and scanning electron microscopy (SEM) were used for the characterization of the synthesized nanopowder. The FTIR and XRD results showed that alpha-alumina nanopowder was synthesized from ammonium dowsonite powder after the calcination at 1150 degrees C for I It. Also, SEM micrographs showed that the final nanoparticles have aggregated structures in 50-100 nm range.