Fabrication and electrical properties of grain-oriented 0.91Pb(Zn_(1/3)Nb2/3)O_3- 0.09PbTiO_3 ceramics

摘要

(200) grain-oriented 0.91Pb(Zn_(1/3)Nb2/3)O_3- 0.09PbTiO_3 (PMN-0.09PT) piezoelectric ceramics with a degree of orientation of 0.5052 have been produced from melt by a directional solidification method. The dielectric, ferroelectric, and piezoelectric properties were investigated, e.g., ε-4200, tan5~0.8%, d_(33)~2100pC/N, kt~58%, and k_(33)~90%, some of these values are comparable to those of -PZN-PT single crystals. The strain-electric-field curve with a maximum strain of 0.49% at a field of 7kV/cm and well-saturated hysteresis loops with a Pr~32 mC/cm~2 were recorded. The results demonstrate that the directional solidification method is a promising technique to fabricate high performance grain-oriented PZN-PT ceramics.