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0.40% Bipolar Strain in Lead Free BNT – KNN System Modified with Li , Ta and Sb
Author(s) -
Singh Amrita,
Chatterjee Ratnamala
Publication year - 2013
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.12054
Subject(s) - tetragonal crystal system , phase boundary , materials science , strain (injury) , analytical chemistry (journal) , trigonal crystal system , crystallography , solid solution , phase (matter) , mineralogy , condensed matter physics , chemistry , crystal structure , metallurgy , physics , medicine , organic chemistry , chromatography
In this work we demonstrate a large electric field‐induced bipolar strain ~0.40% in Li , Ta and Sb modified BNT – KNN ((1− x ) Bi 0.5 Na 0.5 TiO 3 – x K 0.47 Na 0.47 Li 0.06 Nb 0.74 Sb 0.06 Ta 0.2 O 3 ) system. The morphotropic phase boundary ( MPB ) of the system between rhombohedral and tetragonal phases lies in the range 0.02 ≤ x ≤ 0.06, beyond which all compositions (up to x < 0.15) were found to be tetragonal. A clear trade‐off between the large strain values and achievable d 33 , k p for a particular composition was noted. It is shown that while for x = 0.03, d 33 169 pC/N, k p 49% and strain ~0.13% were obtained, for x = 0.08 with 0.40% strain, d 33 and k p values decreased drastically.