Although both the phase type and fraction of multi-phase coexistence can affect the electrical properties of (K,Na)NbO₃ (KNN)-based ceramics, effects of phase fraction on their electrical properties were few concerned. In this work, through changing the calcination temperature of CaZrO₃ powders, we successfully developed the 0.96 K_0.5Na_0.5Nb_0.96Sb_0.04O₃-0.01CaZrO₃-0.03Bi_0.5Na_0.5HfO₃ ceramics containing a wide rhombohedral-tetragonal (R-T) phase coexistence with the variations of T (or R) phase fractions. It was found that higher T phase fraction can warrant a larger piezoelectric constant (d₃₃) and d₃₃ also showed a linear variation with respect to tetragonality ratio (c/a). More importantly, a number of domain patterns were observed due to high T phase fraction and large c/a ratio, greatly benefiting the piezoelectricity. In addition, the improved ferroelectric fatigue behavior and thermal stability were also shown in the ceramics containing high T phase fraction. Therefore, this work can bring a new viewpoint into the physical mechanism of KNN-based ceramics behind R-T phase coexistence.

尽管多相共存的相类型和分数都可以影响基于（K，Na）NbO ₃（KNN）的陶瓷的电性能，但很少关注相分数对其电性能的影响。在这项工作中，通过改变CaZrO ₃粉末的煅烧温度，我们成功开发了0.96 K _0.5 Na _0.5 Nb _0.96 Sb _0.04 O ₃ -0.01CaZrO ₃ -0.03Bi _0.5 Na _0.5 HfO ₃包含宽菱形-四方（RT）相的陶瓷与T（或R）相分数的变化共存。发现较高的T相分数可确保较大的压电常数（d ₃₃），并且d ₃₃相对于四方性比（c / a）也显示出线性变化。更重要的是，由于高T相分数和大c / a，观察到了许多畴模式比率，极大地有益于压电性。另外，在含有高T相分数的陶瓷中也显示出改善的铁电疲劳性能和热稳定性。因此，这项工作可以为RT相共存背后的KNN基陶瓷的物理机理带来新的观点。