Abstract

The (1−x)(Bi_0.487Na_0.487La_0.017)TiO₃-x(Ba_0.7Sr_0.3)TiO₃ or BNLT-BST were fabricated by a solid-state mixed oxide. With increasing BST content, a phase transition from the BNLT rhombohedral to the BST tetragonal was observed. The addition of BST inhibited grain growth which resulted in the improvement of the densification, mechanical and dielectric properties. The maximum of HV (6.68 GPa), HK (6.61 GPa), E (89 GPa), K_IC (1.55 MPa m^1/2), ε_r (1911) and tan δ (0.0394) were observed for the x = 0.20 ceramic. The highest d₃₃ (140 pC/N) and g₃₃ (12.69 × 10⁻³ Vm/N) were observed for the x = 0.05 ceramic. The J decreased while ρ increased with an increasing amount of the additive.

摘要

通过固态混合氧化物制造（1- x）（Bi _0.487 Na _0.487 La _0.017）TiO ₃ - x（Ba _0.7 Sr _0.3）TiO ₃或BNLT-BST。随着BST含量的增加，观察到从BNLT菱面体到BST四方体的相变。BST的添加抑制了晶粒的生长，从而提高了致密化，机械和介电性能。的最大HV（6.68 GPa）的，HK（6.61 GPa）的，È（89 GPa）的，ķ _IC（1.55兆帕米^1/2），ε _{- [R}x  = 0.20陶瓷观察到（1911）和tanδ（0.0394）。对于x  ＝ 0.05的陶瓷，观察到最高的d ₃₃（140pC / N）和g ₃₃（12.69×10 ^-3 Vm / N）。所述Ĵ而降低ρ与添加剂的量增加增加。