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Vol. 25 No. 10 (2013): Vol 25 Issue 10

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Crystal Structure and Properties of Na2O-Modified K0.47Na0.47Li0.06Nb0.96Sb0.04O3-SrTiO3 Piezoelectric Ceramics

https://doi.org/10.14233/ajchem.2013.OH51
Qiyi Yin
Department of Chemistry and Material Engineering, Hefei University, Hefei 230022, P.R. China ; School of Physics and Material Science, Anhui University, Hefei 230039, P.R. China
Zhaoqi Sun
School of Physics and Material Science, Anhui University, Hefei 230039, P.R. China
Changan Tian
Department of Chemistry and Material Engineering, Hefei University, Hefei 230022, P.R. China
Xishun Jiang
School of Physics and Material Science, Anhui University, Hefei 230039, P.R. China
Jihai Chen
Department of Chemistry and Material Engineering, Hefei University, Hefei 230022, P.R. China
Jinsong Xie
Department of Chemistry and Material Engineering, Hefei University, Hefei 230022, P.R. China
Meiling Bao
Department of Chemistry and Material Engineering, Hefei University, Hefei 230022, P.R. China

Corresponding Author(s) : Changan Tian

tianchangan@hfuu.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 10 (2013): Vol 25 Issue 10

Abstract

Na2O-modified (1-x)K0.47Na0.47Li0.06Nb0.96Sb0.04O3-xSrTiO3 (abbreviated as KNLNS-ST, x = 0, 0.015, 0.035, 0.055, 0.08) Lead-free piezoelectric ceramics were fabricated by conventional ceramics sintering technique at 1050 ºC and their crystal structure, dielectric and piezoelectric properties were systematically investigated. The X-ray diffraction revealed that all ceramics possessed a pure perovskite structure and a morphotropic phase boundary between the tetragonal and rhombohedral phases was identified in the composition range of 0.015 £ x £ 0.035, leading to a significant improvement in the electrical properties of the ceramics. The ceramic with x = 0.035 exhibited excellent properties at room temperature (d33=186pC/N, kp = 42 %, er = 1116, tan d = 1.8 %) owning to the formation of morphotropic phase boundary. These results indicated that the ceramic is a promising candidate material for lead-free piezoelectric ceramics.

Keywords

Lead-free Piezoelectric Dielectric Ceramics Phase structure
Yin, Q., Sun, Z., Tian, C., Jiang, X., Chen, J., Xie, J., & Bao, M. (2013). Crystal Structure and Properties of Na2O-Modified K0.47Na0.47Li0.06Nb0.96Sb0.04O3-SrTiO3 Piezoelectric Ceramics. Asian Journal of Chemistry, 25(10), 5655–5657. https://doi.org/10.14233/ajchem.2013.OH51
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