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7144641 
Journal Article 
Large piezoelectric effect in Bi1/2Na1/2TiO3-based lead-free piezoceramics 
Cheng, R; Xu, Z; Chu, R; Hao, J; Du, J; Ji, W; Li, G; , 
2015 
1 
Ceramics International
ISSN: 0272-8842
EISSN: 1873-3956 
ELSEVIER SCI LTD 
OXFORD 
8119-8127 
WOS:000354140300122 
The 0.935Bi(1/2)Na(1/2)TiO(3)-0.065BaTiO(3)-100xBi(2)FeCrO(6) (x=0-0.013) (BNT BT-100xBFC0) lead-free piezoelectric ceramics were fabricated by a conventional solid-state reaction method and the effect of BFCO addition on the microstructure and electrical properties of the ceramics was investigated. All the samples have a relative density higher than 97% of their theoretical values. X-ray diffraction (XRD) patterns show that all compositions have a pure perovskite structure and BFCO effectively diffused into the BNT BT lattice during sintering to form a solid solution. SEM images indicate that the grain size of BNT BT ceramics firstly increases and then decreases with the increase of BFCO content, and all the modified ceramics have a clear grain boundary and a uniformly distributed grain size. Appropriate BFCO doping into BNT BT ceramics induce the enhancement of piezoelectric and ferroelectric properties. Improved P-r=42.3 mu C/cm(2), low E of 28.7 kV/cm, and high d(33)=214 pC/N, k(p)=33% were observed at x=0.007. These results indicate that the modified BNT BT ceramics might be promising leadfree piezoelectric candidates for practical applications. (C) 2015 Published by Elsevier Ltd and Techna Group S.r.l.