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The patent describes the making of yttrium aluminium perovskite powder useful a precursor materials for making sintered components for engineering application. The solutions of yttrium salt as well as aluminium salt were mixed with the addition of aqueous ammonia in the form of aqueous solution while stirring or gaseous ammonia is passed through the mixed salt solution to obtain a semi-solid gel mass and heat treated to produce yttrium aluminium perovskite powder. Here the principle of intermediate polynuclear complexing affect the formation of homogeneous yttrium aluminium perovskite powder at a temperature as low as 8000C.