Synthesis of metastable, wurzite-based zinc oxide-cobalt(II) oxide solid solutions by spray pyrolysis

Aqueous solutions of acetates and nitrates of zinc and cobalt have been spr ay decomposed to study the production of extended solid solutions in the Zn O-CoO system. Examination of the products of a variety of synthesis conditi ons indicates that up to 70% CoO may be retained in the solid solution in t he wurzite phase, even though a comparison of the equilibrium solubility in the phase diagram might be expected to favor the formation of a rock-salt- based solid solution.