Improved solid-state conversion and piezoelectric properties of 90Na(1/2)Bi(1/2)TiO(3)-5BaTiO(3)-5K(1/2)Na(1/2)NbO(3) single crystals

Na1/2Bi1/2TiO3-BaTiO3-K1/2Na1/2NbO3 (NBT-BT-KNN) is a promising candidate system for actuator applications in lead-free piezoelectric materials because of its large electric-field-induced strain. We were able to fabricate 96.9% dense 90NBT-5BT-5KNN (mol%) single crystals by the solid-state single crystal growth technique using sintered pellets and SrTiO3 seed crystals. The fabricated single crystals with a (001) direction exhibited high piezoelectric performance with a large strain of 0.67% and a high converse piezoelectric constant (S-max/E-max) of about 1670 pm/V at 4 kV/mm. These values are much higher than those previously reported for ceramics, 0.45% and 560 pm/V at 8 kV/mm, and for single crystals, 0.57% and 950 pm/V at 6 kV/mm, of the NBT-BT-KNN system. The measured piezoelectric properties are even comparable with those of lead-containing piezoelectric single crystals, which demonstrates high applicability of the fabricated NBT-5BT-5KNN single crystals for actuators. (C) 2016 Published by Elsevier Ltd
Publisher
ELSEVIER SCI LTD
Issue Date
2017-01
Language
ENG
Keywords

LEAD-FREE PIEZOCERAMICS; CERAMICS; STRAIN; BOUNDARY; BEHAVIOR; SYSTEM

Citation

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.37, no.1, pp.407 - 411

ISSN
0955-2219
DOI
10.1016/j.jeurceramsoc.2016.07.023
URI
http://hdl.handle.net/10203/214090
Appears in Collection
EEW-Journal Papers(저널논문)
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