Effect of titanium substitution on magnetic and dielectric properties of BaFe12O19 ceramics prepared by solid-state and co-precipitation methods

Barium ferrite has been modified by addition of titanium ions according to the formula BaTixFe(12-x)O19, with values of x as 0.00, 0.07, 0.14, 0.42, and 0.70. Samples were synthesized via solid-state and co-precipitation methods and then characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) as well as thermal analysis of dielectric constant and magnetization. The majority phase of barium ferrite with a hexagonal structure is observed in all samples, while the presence of Ti 2p was confirmed in the titanium-substituted samples. The saturation magnetization values for samples with x = 0.00, 0.07, and 0.14 are near the 50 emu/g. In contrast, samples with higher x values as 0.42 and 0.70 show significant magnetization loss with some low-temperature magnetic transition observed for x = 0.42. Dielectric charac-terization performed by thermal scanning of dielectric permittivity shows a substantial increase in the dielectric constant. It reveals the presence of a paraelectric-like transition at high temperatures induced by the addition of titanium.

Automated summary

Barium ferrite has been modified by adding titanium ions (BaTixFe(12-x)O19, where x values are 0.00, 0.07, 0.14, 0.42, and 0.70). The synthesized samples were characterized using XRD, XPS, SEM, and thermal analysis of dielectric constant and magnetization. The majority phase observed in all samples is hexagonal barium ferrite, with the presence of Ti 2p confirmed in the titanium-substituted samples. There is a significant increase in the dielectric constant due to the addition of titanium.