The BaTiO3 and BaTi0.99Fe0.01O3-δ ceramics were prepared via a solid state reaction method. The crystallite structure, microstructure, dielectric and ferroelectric properties of the ceramics were studied. The Fe3+ ions were soluble into BaTiO3 lattice with the given concentration. The crystallite structure was investigated by using Rietveld refinement and the results show a decrease in the tetragonality due to the doping of Fe3+. Both ceramics have dense microstructures. The mean grain size of BaTi0.99Fe0.01O3-δ is larger than that of BaTiO3. Compared with BaTiO3, BaTi0.99Fe0.01O3-δ demonstrates decreased dielectric constant, Curie temperature and ferroelectric properties. A diffuse phase transition behavior was observed on the dielectric constant-temperature curves of BaTi0.99Fe0.01O3-δ. The differences in dielectric and ferroelectric properties between the two ceramics were discussed.

Keywords: Ceramic, Crystallite structure, Microstructure, Dielectric properties, Ferroelectric prop