Na_0.5Bi_2.5Nb_2-xCo_xO₉ (NBNC-x, x = 0.00, 0.02, 0.05, 0.07, 0.09) bismuth layered piezoelectric ceramics were synthesized by the traditional solid-state method. The microstructure, piezoelectric, dielectric and ferroelectric properties of Co³⁺ doped NBNC-x ceramics were systematically investigated. The XRD results showed all ceramics possess bismuth layered structure. The Curie temperature (T_c) gradually enhanced from 778 to 793 °C with the addition of Co³⁺ content. Moreover, the Co³⁺ doping significantly enhance piezoactivity (d₃₃) and ferroelectricity (P_r), and reduce dielectric loss (tan δ). The Na_0.5Bi_2.5Nb_1.93Co_0.07O₉ ceramic had optimum combinations of electrical properties (e.g., d₃₃ ~ 20.1 pC/N, P_r ~ 4.22 μC cm⁻², tan δ ~ 0.31%, Q_m ~ 3405). These results indicate that the Co³⁺ doped Na_0.5Bi_2.5Nb₂O₉ ceramics has potential application in the high-temperature field.

 采用传统固相法合成了Na _0.5 Bi _2.5 Nb _{2- x} Co _x O ₉ (NBNC- x , x = 0.00, 0.02, 0.05, 0.07, 0.09) 铋层状压电陶瓷。系统研究了Co ³⁺掺杂NBNC- x陶瓷的微观结构、压电、介电和铁电性能。XRD结果表明所有陶瓷都具有铋层状结构。随着 Co ³⁺含量的增加，居里温度（T _c）从 778 ℃逐渐升高到 793 ℃ 。此外，Co ³⁺掺杂显着增强压电活性 ( d ₃₃ ) 和铁电性 ( P _r )，并降低介电损耗 (tan δ )。中的Na _0.5的Bi _2.5 Nb的_1.93钴_0.07 ö ₉陶瓷具有电性能的最佳组合（例如，d ₃₃  〜20.1 PC / N，P _[R  〜4.22μC厘米^-2，黄褐色δ  〜0.31％，Q_米 〜3405）。这些结果表明，Co ³⁺掺杂的 Na _0.5 Bi _2.5 Nb ₂ O₉陶瓷在高温领域具有潜在应用。