Lead-free (1-x)(Bi_0.487Na_0.487La_0.017)TiO₃-x(Ba_0.7Sr_0.3)TiO₃ or (1-x)BNLT-xBSrT ceramics were fabricated by a solid state reaction and sintered at 1050–1200 °C for 2 h. All sintered samples had a relative density > 97% of their theoretical values. With increasing BSrT, the transition from BNLT rhombohedral to BSrT tetragonal was observed. The addition of BSrT inhibited grain growth which resulted in the improvement of the densification of the BNLT ceramic. The changes in the BSrT content also induced a phase transition from the ferroelectric (FE) phase to the ergodic relaxor (ER) phase. These changes significantly disrupted long-range ferroelectric order, thereby correspondingly reducing the P_r and E_c values and resulting in the enhancement of the electric field-induced strain and electrostrictive response. A large S_max = 0.41%, d^*₃₃ = 788 pm/V and electrostrictive coefficient (Q₃₃ = 0.04119 m⁴/C²) were observed for the x = 0.08 sample. In addition, the x = 0.15 sample showed good energy storage density (W = 0.66 J/cm³) and energy storage efficiency (η = 82.7%) @ 150 °C. Overall, these results indicated that these ceramics had the potential of becoming one of the promising lead-free piezoelectric candidates for piezoelectric applications.

无铅（1- x）（Bi _0.487 Na _0.487 La _0.017）TiO ₃ - x（Ba _0.7 Sr _0.3）TiO ₃或（1- x）BNLT- xBSrT陶瓷是通过固相反应制造的，并在1050–1200°C下烧结2 h。所有烧结样品的相对密度均大于其理论值的97％。随着BSrT的增加，观察到从BNLT菱面体向BSrT四边形的过渡。BSrT的添加抑制了晶粒的生长，从而改善了BNLT陶瓷的致密化。BSrT含量的变化也引起了从铁电（FE）相到遍历弛豫（ER）相的转变。这些变化显着破坏了远距离铁电有序性，从而相应地降低了P _r和E _c值，并导致了电场感应应变和电致伸缩响应的增强。大S对于x＝ 0.08的样品，观察到_max＝ 0.41％， d ^* ₃₃＝788pm/ V和电致伸缩系数（ Q ₃₃＝ 0.04119m ⁴ / C ²）。此外， x = 0.15的样品在150°C下显示出良好的储能密度（ W = 0.66 J / cm ³）和储能效率（ η = 82.7％）。总体而言，这些结果表明，这些陶瓷有潜力成为压电应用中有希望的无铅压电候选材料之一。