期刊
CERAMICS INTERNATIONAL
卷 40, 期 2, 页码 2627-2634出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.10.066
关键词
Ferroelectric; Electrocaloric effect; Lead-free
资金
- National Natural Science Foundation of China [51002082, 61378068]
- Natural Science Foundation of Ningbo [2012A610118]
- K. C. Wong Magna Fund in Ningbo University [xkz11203]
Lead-free ferroelectric ceramics (1-x)Bi0.5Na0.5TiO3-xKNbO(3) (BNT-xKN) with x=0.00, 0.04, 0.06 and 0.08 were synthesized by the conventional solid state reaction method. The effects of the KNbO3 addition on the dielectric behavior, ferroelectric properties, as well as electrocaloric effect of the ferroelectric ceramic BNT-xKN were investigated. The results show that the depolarization temperature decreases with the increment of KN content. A high BCE of 1.73 degrees C is achieved at 76 degrees C in BNT-0.06KN. The relation between electrocaloric effect and depolarization transition was discussed. This investigation indicates that the depolarization transition below Curie transition in BNT-based ceramics is a promising approach in ECE technique. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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