【摘要】 采用铌铁矿前驱体两步法制备了Pb(Zn_1/3Nb_2/3)_0.2(Hf_1-xTi_x)_0.8O₃(PZNH_1-xT_x)钙钛矿压电陶瓷，研究了铪钛比对陶瓷相结构、电学性能和能量收集特性的影响。结果表明，当x=0.52时，陶瓷样品位于准同型相界，具有最优综合压电性能：居里温度T_C=287℃,品质因数FOM≈14 753×10^-15 m²/N,压电电荷常数d₃₃=492 pC/N。由该组成材料构建的悬臂梁型压电能量收集器输出功率密度高达4.16μW/mm³,所转化的电能可成功点亮138盏并联的LED灯。结果表明，PZNHT陶瓷在压电能量收集领域具有良好的应用潜力。更多还原

【Abstract】 The Pb(Zn_1/3Nb_2/3)_0.2(Hf_1-xTi_x)_0.8O₃(PZNH_1-xT_x) perovskite piezoceramics were prepared by a two-step columbite precursor method. The effects of the ratio of Hf and Ti on the phase structure, electrical performance and energy harvesting characteristics were investigated. The results show that x=0.52 is located at the morphotropic phase boundary, and has the optimal comprehensive piezoelectric properties: Curie temperature T_C of 287 ℃, figure of merit FOM of 14 753×10^-15 m²/N, piezoelectric charge constant d₃₃ of 492 pC/N. In addition, the cantilever beam-type piezoelectric energy harvester constructed from x=0.52 sample exhibited an output power density of up to 4.16 μW/mm³ and the generated power can successfully lit 138 parallel LED lights. The above results show that PZNHT ceramics have good application potential in the field of piezoelectric energy harvesting.更多还原