期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 41, 页码 L359-L361出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.08.024
关键词
Lead-free piezoelectric ceramic; Piezoelectric properties; Dwell time
资金
- Sichuan University [2082204144033]
- National Science Foundation of China (NSFC) [51102173, 50772068, 50972001]
- Foundation of Doctor Training Program in University and College in China [20030610035, 20080610020]
- National University of Singapore
In this letter, the effect of dwell time (1-6 h) during sintering on the piezoelectric properties is investigated for the (Ba0.85Ca0.15)(Ti0.90Zr0.10)O-3 ceramics. All ceramics sintered at different dwell time are of a pure phase, and its structure distortion is induced by too long dwell time. Their dielectric constant and remanent polarization increases and the coercive field decreases with increasing dwell time. An enhanced piezoelectric behavior (d(33) similar to 492 pC/N and k(p) similar to 51.5%) is demonstrated for the BCTZ ceramic with an optimum dwell time of 5 h, owing to the structure distortion together with a dense microstructure and a larger grain size. (C) 2011 Elsevier B.V. All rights reserved.
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