Fabrication and Electrical Properties of Ba(Zr,Ti)O_3 Textured Ceramics by Templated Grain Growth

摘要

The (MO) textured Ba(Zr_(0.085)Ti_(0.915)0_3 (BZT) ceramics were fabricated by templated grain growth using anisotropically shaped BaTiO_3 (BT) templates. A high orientation degree (Lotgering's factor) of 85% calculated from X-ray diffraction (XRD) patterns was obtained. The dielectric, ferroelectric, piezoelectric properties of the random and textured BZT ceramics have been studied. The Curie temperature of the textured BZT ceramics was 94℃, which was higher than that of the random BZT ceramics. The textured BZT ceramics exhibited excellent piezoelectric performance with the piezoelectric coefficient d_(33) = 234pC/N, strain levels of 0.22% at 40kV/cm, normalized strain (S_(max)/E_(max)) level of 550 pm/V calculated from the unipolar strain-electric field (S-E) hysteresis loops and remnant polarization P_r = 11.46 μC/cm~2 sintered at 1450 ℃ for 4h with 85% of Lotgering's factor.