Fe2O3改性的0.97PSLZT-(0.03-x)BMT-xPMS陶瓷的压电性能提升及其在高功率压电应用中的潜力

0.97[(Pb 0.94 Sr 0.05 La 0.01 )(Zr 0.51 Ti 0.49 )O 3 ]–(0.03– x )[Bi(Mn 1/2 Ti 1/2 )O 3 ]– x [Pb(Mn 1/3 Sb 2/3 )O 3 ] (PSLZT–BMT–PMS, x = 0.0–0.008) ceramics doped with y wt.% Fe 2 O 3 ( y = 0.0–0.6) were prepared using conventional mixed oxide method. The focus was on studying the simultaneous influence of Pb(Mn 1/3 Sb 2/3 )O 3 composition and Fe 2 O 3 doping on the structural phase modification process to obtain an ultra-high- Q m piezoelectric ceramic. The experimental results revealed that the PSLZT–BMT–PMS ceramics exhibited superior physical properties at the optimum values of x = 0.006 and y = 0.3, with Q m = 2009, tan δ = 0.003, ε r = 1143, d 33 = 425 pC/N, k p = 0.60, P r = 15.3 µC/cm 2 , and d 33 * = 430 pm/V. The superior physical properties were attributed to the phase structure transformation of the ceramics to form the morphological phase boundary, optimized microstructure features, and reduced dielectric loss. Besides, the influence of Fe 2 O 3 doping on the dielectric relaxation behavior and the phase transition temperature of PSLZT–BMT–PMS ceramics was investigated and discussed. The results indicated that the PSLZT–BMT–PMS ceramics doped with 0.3 wt.% Fe 2 O 3 had the following high-temperature parameters related to phase transitions: T f = 286 °C, T m = 320 °C, T CW = 323 °C, T B = 381 °C, and ΔT m = 61 °C, which exhibited the potential for high-power piezoelectric applications.