Preparation of PVP (Polyvinyl Pyrrolidone)/Ba-Sr Hexaferrites via Gel to Crystalline Method

Ba-M- and Sr-M-type hexagonal ferrites have been prepared via a solgel route, and the effects of adding different amounts of polyvinyl pyrrolidone (PVP) into the sol solutions. The average crystallite, size, D and s, was obtained as for Z13 = 22 +/- 2 nm and Z13-2 = 16 +/- 3 nm and for Z16 = 18 +/- 7 nm and Z16-2 = 17 +/- 5 nm by XRD. FT-IR and TG analysis were used to prove the presence of PVP on BaFe12O19 and SrFe12O19. Based on the TGA curves the mass losses of the samples are assessed as follows: Z13 15%, Z13-2 25%, Z16 5%, and Z16-2 10%.