【摘要】 采用固相合成法制备了(1-x)(Ba0.89Pb0.1Ca0.01)(Ti0.99Zr0.01)O3-xBiFeO3(BPCTZ-BF,0≤x≤0.01)压电陶瓷,研究了BiFeO3对BPCTZ陶瓷晶体结构,介电和压电性能的影响。XRD结果表明Bi3+和Fe3+均进入BPCTZ晶格中,形成了具有纯钙钛矿结构的固溶体。随着BiFeO3含量的增加,居里温度(tC)向高温方向移动,当BiFeO3含量为x=0.004时,陶瓷样品的居里温度达到最大值178℃。在x=0.002时,该体系陶瓷具有最佳的压电性能:压电常数d33=144 pC/N,平面机电耦合系数k P=0.242,机械品质因数Qm=184。更多还原

【Abstract】 (1-x)(Ba0.89Pb0.1Ca0.01)(Ti0.99Zr0.01)O3-x Bi FeO3(BPCTZ-BF, 0 ≤ x ≤ 0.01) lead-reduced ceramics were prepared by the conventional solid-state reaction method. The effects of BiFeO3 doping on the crystal structures, dielectric and piezoelectric properties of the ceramics were studied. The XRD results show that Bi3+ and Fe3+ diffuse into the BPCTZ lattices to form a new solid solution with a pure perovskite structure. The Curie temperature(t C) increases with increasing BiFeO3 content, and it reaches the maximum value of 178 ℃ at x=0.004. The optimum piezoelectric properties of d33=144p C/N, k P=0.242 and Qm=184 are obtained at x=0.002.更多还原