Effect of Ni doped BaTiO3 on the dielectric properties in the Ba(Ni1/3Nb2/3)xTi1−xO3 solid solution

Abstract New ferroelectric ceramics of ABO 3 perovskite type were synthesized in the Ba(Ni 1/3 Nb 2/3 ) x Ti 1− x O 3 (0 ≤  x  ≤ 0.2) system by solid state reaction technique. The effect of the replacement of titanium by nickel and niobium in the B site on structural and dielectric properties was investigated. For this, we have use X-ray diffraction and dielectric characterizations. Samples in cubic phase were generally obtained with a sintering temperature of 1350 °C. Dielectric measurements revealed that the very small change in composition by the substitution of titanium by nickel and niobium in the BaTiO 3 has a strong influence on the dielectric proprieties: fast decreasing of T C or T m (for BaTiO 3 T C  = 340 K, for x  = 0.06, T C  = 270 K and for x  = 0.16, T m  = 150 K). The evolution from classic ferroelectric behavior for (0 ≤  x x  ≤ 0.2) is emphasized.