Although phase boundary engineering has made notable progress in improving the electrical properties of (K,Na)NbO₃-based piezoceramics, lattice distortion and spontaneous polarization of multiphase coexisting systems are a few of the remaining concerns. Here, new research employing XRD Rietveld refinement was performed to explore crystal structures, phase fractions and atomic parameters of Fe₂O₃-added (0.995-x)K_0.48Na_0.52NbO₃-xBi_0.5Na_0.5ZrO₃-0.005BiScO₃ ceramics. The distortion of the oxygen octahedron and the spontaneous polarization were presented. Central cation displacement provides a much larger contribution to polarization and the electric dipole moment in orthorhombic phase is much larger than that in tetragonal phase. Benefiting from tetragonal-orthorhombic phase coexistence and lattice distortion, optimized ferroelectric and piezoelectric properties (d₃₃ ∼ 381 pC/N, P_r ∼ 20.47 μC/cm²) were obtained. The ceramic still holds a large d₃₃ (313 pC/N) after up to 300 ℃ of thermal annealing. A series of material constants was also calculated and compared to lead-based ones.

尽管相界工程学在改善基于（K，Na）NbO ₃的压电陶瓷的电性能方面取得了显着进展，但多相共存系统的晶格畸变和自发极化仍然是一些尚待解决的问题。在这里，进行了使用XRD Rietveld精炼的新研究，以探索添加了Fe ₂ O _3的（0.995- x）K _0.48 Na _0.52 NbO ₃ - x Bi _0.5 Na _0.5 ZrO ₃ -0.005BiScO _3的晶体结构，相分数和原子参数。陶瓷。给出了氧八面体的畸变和自发极化。中心阳离子位移为极化提供了更大的贡献，正交相中的电偶极矩比四方相中的电偶极矩大得多。从四方-正交相共存和晶格畸变，优化的铁电和压电性能获益（d ₃₃  〜381 PC / N，P _[R  〜20.47μC/厘米²）获得。在高达300℃的温度下进行热退火后，陶瓷仍具有较大的d ₃₃（313 pC / N）。还计算了一系列材料常数，并将其与基于铅的常数进行比较。