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Synthesis and Structural, Ferroelectric, and Piezoelectric Properties of SrBi 4 Ti 4 O 15 Ceramics
Author(s) -
Gelfuso Maria V.,
Thomazini Daniel,
Eiras José A.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02092.x
Subject(s) - materials science , orthorhombic crystal system , poling , piezoelectricity , ferroelectricity , dielectric , ceramic , polarization (electrochemistry) , scanning electron microscope , mineralogy , coercivity , ferroelectric ceramics , crystallography , octahedron , crystal structure , composite material , condensed matter physics , optoelectronics , chemistry , physics
SrBi 4 Ti 4 O 15 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 (Bi 2 O 2 ) 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.