Dielectric, ferroelectric, and piezoelectric properties of textured BZT-BCT lead-free thick film by screen printing

摘要

The (001) textured (Ba_(0.85)Ca_(0.15))(Zr_(0.1)Ti_(0.9))O_3 (BCZT) thick films were fabricated via screen printing using anisotropically shaped BaTiO_3 templates on platinum substrate. The dielectric, ferroelectric, and piezoelectric properties of the random and textured BCZT thick films have been investigated. The orientation degree (Lotgering's factor) of 81% calculated from X-ray diffraction patterns was obtained. The Curie temperature of the textured BCZT thick film shifted to a high temperature in comparison with the random BCZT thick film. The textured BCZT thick film exhibited excellent electric properties with the piezoelectric constant d_(33)~* = 427 pm/V and remnant polarization P_r = 15.8 μC/cm~2 sintered at 1300 ℃ for 4 h with 81 % of Lotgering's factor.