Mv. Gelfuso et al., Synthesis and structural, ferroelectric, and piezoelectric properties of SrBi4Ti4O15 ceramics, J AM CERAM, 82(9), 1999, pp. 2368-2372
SrBi4Ti4O15 ceramics were prepared via ordinary firing (OF) and hot forging
(HF). Characterization using scanning electron microscopy and X-ray diffra
ctometry 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 thickn
ess coupling factor for OF samples was only half that for HF samples orient
ed parallel to the HF direction (in the ab-plane), as a consequence of poli
ng restrictions in randomly oriented grains.