Zirconia (ZrO2) occurs in three crystallographic forms- monoclinic, tetragonal and cubic with monoclinic being the most stable form among these three. Although cubic and tetragonal phases are not the thermodynamically favored at room temperature, these are stabilized by the addition of Y2O3, CaO, MgO, CeO2, and CuO. The phase stabilization of ZrO2 by these dopants is the basis of chemical and mechanical properties of zirconia based ceramics that are important for energy conversion related applications. In the present study, stabilized zirconia powders with different dopant (Y2O3, CaO, MgO, CeO2, and CuO) concentrations are synthesized by a one step flame spray pyrolysis. In this process, aqueous solutions of precursors are atomized using a nebulizer. The atomized solution is then passed through the flame reactor. In the reactor, the precursors react in the solid phase, forming the final product. The particles are collected by thermophoresis onto a water-cooled surface. The materials are characterized by using FTIR spectroscopy, X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and BET surface area. X-ray diffraction study shows the formation of cubic and tetragonal phases of the as prepared powders. BET surface areas of the as prepared samples are in the range of 10-80 m2/g. The stabilized zirconia particles are roughly spherical in shape and size in the range of 30 - 100 nm depending on the stabilizing agents used. The tetragonal / cubic phase stabilization effect for the dopants were found to be, in order of decreasing ability to stabilize the cubic phase, Y2O3 > CaO > CeO2 > MgO > CuO, whereas the ionic radii are Ca2+ > Y3+ >Ce4+ >Mg2+ > Cu2+.