(Reactive) Templated Grain Growth of Textured Sodium Bismuth Titanate (Na{sub}(1/2)Bi{sub}(1/2)TiO{sub}3-BaCO{sub}3) Ceramics - II Dielectric and Piezoelectric Properties

摘要

(Na{sub}(1/2)Bi{sub}(1/2))TiO{sub}3-BaCO{sub}3 (<6.5% BaTiO{sub}3) ceramics with <001>{sub}(pc) orientation were fabricated by Templated Grain Growth (TGG) or Reactive Templated Grain Growth (RTGG) using tabular SrTiO{sub}3 template particles. The maximum electrically-induced strain was 0.26% at 70 kV/cm. d{sub}33 coefficients over 500 pC/N were obtained for highly textured samples (f ～ 90%) when driven at high electric fields. Under these conditions, the materials show considerable hysteresis in the strain-field response, even after poling. Berlincourt piezoelectric coefficients for the same samples gave d{sub}33 of 200 pC/N.