期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 37, 期 1, 页码 407-411出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.07.023
关键词
Lead-free piezoelectric; Single crystal; Solid-state growth; Electric-field-induced strain; NBT-BT-KNN
资金
- National Research Foundation of Korea (NRF) - the Ministry of Science, ICT Future Planning (MSIP) [2011-0017556]
- Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [2013M3A6B1078874]
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.
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