Synthesis and Structural, Ferroelectric, and Piezoelectric Properties of SrBi4Ti4O15 Ceramics

SrBi4Ti4O15 ceramics were prepared via ordinary firing (OF) and hot forging (HF). Characterization using scanning electron microscopy and X‐ray diffractometry shows platelike grains that were highly oriented (F= 0.95) after hot forging. Ferroelectric, dielectric, and piezoelectric characterizations revealed that polarization reorientation was restricted to the ab plane of the orthorhombic structure, parallel to the (Bi2O2)2+ layers. The thickness coupling factor for OF samples was only half that for HF samples oriented parallel to the HF direction (in the ab‐plane), as a consequence of poling restrictions in randomly oriented grains.