Large Electromechanical Strain in Lead‐Free Binary System   K   0.5   Bi   0.5   TiO   3 ‐  Bi  (  Mg   0.5   Ti   0.5 )  O   3 | Zendy

Zeb Aurang | Zendy; Milne Steven J. | Zendy

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Large Electromechanical Strain in Lead‐Free Binary System K 0.5 Bi 0.5 TiO 3 ‐ Bi ( Mg 0.5 Ti 0.5 ) O 3

Author(s) -

Zeb Aurang,

Milne Steven J.

Publication year - 2014

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/jace.13110

Subject(s) - tetragonal crystal system , single phase , materials science , analytical chemistry (journal) , phase (matter) , crystallography , polarization (electrochemistry) , binary number , mineralogy , chemistry , crystal structure , electrical engineering , arithmetic , mathematics , organic chemistry , chromatography , engineering

Solid solution formation in the lead‐free binary system (1− x ) K 0.5 Bi 0.5 TiO 3 − x Bi ( Mg 0.5 Ti 0.5 ) O 3 has been studied for compositions x ≤ 0.12. X‐ray powder diffraction shows single‐phase perovskite for x < 0.1, and a mixed phase region between tetragonal and pseudocubic phases for compositions 0.04 ≤ x ≤ 0.06. Large electromechanical strains of ~0.3% at fields of 50 kV/cm are recorded in the mixed phase region, with d 33 * ( S max / E max ) values of ~600 pm/V. The materials sustain polarization at low electric fields with remnant polarization ~18 μC/cm 2 and coercive field ~20 kV/cm for x = 0.06. Relative permittivity‐temperature plots display relaxor characteristics, with peak temperature ~340°C.

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