In this work, composition-insensitive enhanced piezoelectric properties are achieved in (1-x)(K_0.48Na_0.52)_0.96Li_0.04(Nb_0.96Sb_0.04)O₃-xSrZrO₃ (KNN-SZ) lead-free ceramics. Rietveld refinements of the XRD patterns show that the introduction of SrZrO₃ straightens the O-B-O bond, leading to a relatively broad compositional region from x = 0.04 to 0.06 for the coexistence of orthorhombic-tetragonal (O-T) phase at room temperature. Within the phase coexistence region, relatively large and composition insensitive piezoelectric properties d₃₃ = 250 ~ 256 pC/N and k_p = 0.42 ~ 0.46, as well as low dielectric loss tan δ = 0.026 ~ 0.028 are attained in the KNN-SZ ceramics. The composition insensitivity of piezoelectric properties benefits from the enlarged ε_r and decreased P_r, which are originated from facilitated polarization rotation in the phase boundary region and normal ferroelectric-to-relaxor transition, respectively. Furthermore, an ultrahigh electric-field induced strain S = 0.195% is obtained, compared with reported KNN-based lead-free ceramics.

在这项工作中，在（1- x）（K _0.48 Na _0.52）_0.96 Li _0.04（Nb _0.96 Sb _0.04）O ₃ - x SrZrO ₃（KNN-SZ）无铅陶瓷中实现了对成分不敏感的增强压电性能。XRD图案的Rietveld精炼表明，SrZrO ₃的引入使OBO键变直，从而导致x相对较宽的组成区域 室温下正交的四边形（OT）相的共存系数= 0.04至0.06。内的相共存区域，相对大和组合物不敏感的压电特性ð ₃₃  = 250〜256 PC / N和ķ _p  = 0.42〜0.46，以及低介电损耗tanδ δ  = 0.026〜0.028是获得在KNN-SZ陶瓷。从放大的压电性能益处的组合物不敏感ε _{- [R}和降低的P _{- [R} ，它们分别源于易化偏振旋转在相边界区域和正常铁电到弛豫过渡。此外，超高电场感应应变S 与报道的基于KNN的无铅陶瓷相比，获得的= 0.195％。