Effect of Doping La₂O₃ and Y₂O₃ on Properties of (Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃ Lead-free Ceramics

Effect of doping La₂O₃ and Y₂O₃ on dielectric and piezoelectricity properties of(Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃ lead-free ceramics was investigated.X-ray diffraction analysis shows that doped La₂O₃ and Y₂O₃ exhibit single-phase perovskite structure.SEM observation suggests that when 0.2%La₂O₃ and 0.2%Y₂O₃ is added,the crystal grain is accreted and piezoelectric constant is advanced.When 0.12%La₂O₃ and 0.08%Y₂O₃ is added,piezoelectric constants(d₃₃) reaches the maximum value of 144.6×10^-12C/N and dielectric loss reaches the minimum value of 0.039.