Dielectric and Piezoelectric Properties of xPb(Ni_(1/3)Nb_(2/3))O_3-yPb(Mn_(1/3)Nb_(1/3)Sb_(1/3))O_3- (1-x-y)Pb(Zr_(0.48)Ti_(0.52))O_3 Ceramics

摘要

xPb(Ni_(1/3)Nb_(2/3))O_3-yPb(Mn_(1/3)Nb_(1/3)Sb_(1/3))O_3-(1-x-y)Pb(Zr_(0.48)Ti_(0.52))O_3 ceramics have been prepared by a columbite two-step method. NiNb_2O_6, MnNb_2O_6 and MnSb_2O_6 were used as precursors to produce the pseudoquintnary system ceramics. X-ray diffraction (XRD) results indicate that the pseudoquintnary system ceramics have a single-phase perovskite structure. The piezoelectric and dielectric properties of the ceramics were investigated as functions of x or y. The addition of Pb(Ni_(1/3)Nb_(2/3))O_3 makes the piezoelectric properties to become 'soft', while the addition of Pb(Mn_(1/3)Nb_(1/3)Sb_(1/3))O_3 makes the piezoelectric properties to be 'hard'. The Curie temperature (Tc) of the pseudoquintnary system decreases with the increase of Pb(Ni_(1/3)Nb_(2/3))O_3 or Pb(Mn_(1/3)Nb_(1/3)Sb_(1/3))O_3 contents. The preferred piezoelectric properties were obtained in the composition with x=0.06 and y=0.06.