Study on the relaxation behavior of BaTiO3 ceramics modified with BiMO3 (M = Fe, Y, Al)

The 0.92BaTiO(3)-0.08BiMO(3) (M = Fe, Y, Al) solid solutions were prepared via a conventional solid state reaction technique. X-ray diffractometer, Raman spectra, scanning electron microscope, and impedance analyzer were used to examine the effect of three additions on the crystal structure, micromorphology and dielectric properties of 0.92BaTiO(3)-0.08BiMO(3) (M = Fe, Y, Al) solid solutions. The 0.08 BiMO3 (M = Fe, Y, Al) additions totally transform the characteristic sharp phase transition (associated with permittivity maximum) of pure BaTiO3 into a less-distinct phase transition with a broad and strongly dispersive permittivity maximum characteristic of relaxor dielectrics.