硅酸盐学报

以同时位于准同型相界的Pb(Mn1/3Sb2/3)0.05(Zr1/2Ti1/2)0.95O3(PMnS PZT)与Pb(Zn1/3Nb2/3)0.28(Zr1/2Ti1/2)0.72O3(PZN PZT)组合而成的xPb(Mn1/3Sb2/3)0.05(Zr1/2Ti1/2)0.95O3(1-x)Pb(Zn1/3Nb2/3)0.28(Zr1/2Ti1/2)0.72O3[xPMnS(1-x)PZN]四元系压电陶瓷为研究对象,研究了PZN和PMnS含量的变化对xPMnS(1-x)PZN材料结构与性能的影响,制备了具有高性能的四元系xPMnS(1-x)PZN陶瓷材料。结果表明性能最好的组成位于准同型相界附近靠近四方相含量较高的区域。Ba2+,Sr2+取代显著提高了材料的压电性能,Ba2+取代0.5PMnS0.5PZN的性能为压电系数d33=406pC/N,机电耦合系数kp=0.55,介电常数ε3T3/ε0=2183,机械品质因数Qm=1077和介电损耗tanδ=2.7%;Sr2+取代0.6PMnS0.4PZN的性能为d33=438pC/N,kp=0.55,ε3T3/ε0=2701,Qm=1073和tanδ=3.3%。

xPb(Mn_ 1/3 Sb_ 2/3 )_ 0.05 (Zr_ 1/2 Ti_ 1/2 )_ 0.95 O₃(1-x)Pb(Zn_ 1/3 Nb_ 2/3 )_ 0.28 (Zr_ 1/2 Ti_ 1/2 )_ 0.72 O₃[xPMnS(1-x)PZN]quaternary system ceramics were prepared based on the fact that the materials near the morphotropic phase boundary (MPB) in Pb(Zn_ 1/3 ·Nb_ 2/3 )_ 0.28 (Zr_ 1/2 Ti_ 1/2 )_ 0.72 O₃(PZNPZT) and Pb(Zn_ 1/3 Nb_ 2/3 )_ 0.28 (Zr_ 1/2 Ti_ 1/2 )_ 0.72 O₃(PZNPZT) systems have good electronic properties. The effects of PZN and PMnS contents on the crystal structure and piezoelectric properties of the ceramics were investigated. The results show that the composition of the material with the superior piezoelectric properties is in the tetragonal phase area in the vicinity of the MPB. The substitution of Ba 2+ or Sr 2+ at the A site of the structure apparently improves the electrical properties of the ceramics. After the substitution of Ba 2+ the optimized electrical properties of 0.5PMnS0.5PZN ceramics are as follows: a piezoelectric constant d_ 33 =406 pC/N, a electromechanical coupling factor k_p= 0.55, a dielectric constant εT__ 33 /ε_₀=2183, a mechanical quality factor Q_m=1077 and a dielectric loss tanδ=0.27%. The optimized electrical properties for 0.6PMnS0.4PZN ceramics with Sr 2+ substitution are d_ 33 =438 pC/N, k_p=0.55, εT__ 33 /ε_₀=2701, Q_m=1073 and tanδ=0.33%.