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

Abstract

Ba-M- and Sr-M-type hexagonal ferrites have been prepared via a sol–gel route, and the effects of adding different amounts of polyvinyl pyrrolidone (PVP) into the sol solutions. The average crystallite, size, D and σ, 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%.