A NEW COPRECIPITATION TECHNIQUE FOR THE PREPARATION OF MIXED-OXIDES

Fine ceramic oxide powders of the composition MN2o4 [Spinels ; where M = Ni(II), Zn(II), Co(II), Cd(II) and N = Fe(III), Cr(III) ], M3Fe5O12 [Garnets ; where M = Y, Gd] and RBa2Cu3O7 + delta [Ceramic superconductors ; where R = rare earths] have been synthesized through a novel coprecipitation technique. The novelty of this route lies in its simplicity and cost effectiveness. The coprecipitation has been done using a mixture of (NH4) 2CO3/(NH4)HCO3, triethylamine and formaline in presence of soluble polymers, like polyvinyl alcohol (PVA). The final product formation is confirmed and characterized by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX).