Effect of PbNi1/3Nb2/3O3 on the Dielectric and Piezoelectric Properties of Multicomponent Solid Solutions Based on PbMg1/3Nb2/3O3–PbTiO3

Resumo

The effect of PbNi_1/3Nb_2/3O₃ addition on the dielectric and piezoelectric responses of the mPbMg_1/3Nb_2/3O_3–nPbNi_1/3Nb_2/3O_3–yPbZn_1/3Nb_2/3O_3–xPbTiO₃ ceramic system doped with barium is investigated. It is found that raising the concentration of PbNi_1/3Nb_2/3O₃ results in a sharp drop in the maximum values of piezoelectric module |d₃₁| (by almost half, from 321 to 186 pC/N⁻¹), shifting the maximum of |d₃₁|(x) toward a tetragonal phase (from x ≈ 0.300 to x ≈ 0.325) and increasing the relative permittivity throughout the range of x variation (at low x, from 11 000 to 16 500). Possible reasons for the observed changes are discussed.