A monoclinic-tetragonal ferroelectric phase transition in lead-free (K 0.5Na 0.5)NbO 3-x%LiNbO 3 solid solution

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Wenwei Ge
  • Jialiang Zhang
  • Christopher P. Devreugd
  • Jiefang Li
  • D. Viehland

Detail(s)

Original languageEnglish
Article number103503
Journal / PublicationJournal of Applied Physics
Volume111
Issue number10
Publication statusPublished - 15 May 2012
Externally publishedYes

Abstract

A monoclinic ferroelectric phase with space group Pm has been discovered in lead-free (K 0.5Na 0.5)NbO 3-5LiNbO 3 solid solution ceramics by high energy synchrotron x-ray powder diffraction measurements. At ambient temperature, the lattice parameters of this monoclinic structure were (a m, b m, c m; β) (4.015 Å, 3.944 Å, 3.987 Å; 90.34 °). This monoclinic phase transformed to a tetragonal (P4mm) one on heating between 340 K and 360 K. The results demonstrate the presence of structurally bridging low symmetry monoclinic phase in (K 0.5Na 0.5)NbO 3-xLiNbO 3 solid solution system: indicating a means to achieve high piezoelectricity in Pb-free systems via domain engineering. © 2012 American Institute of Physics.

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Citation Format(s)

A monoclinic-tetragonal ferroelectric phase transition in lead-free (K 0.5Na 0.5)NbO 3-x%LiNbO 3 solid solution. / Ge, Wenwei; Ren, Yang; Zhang, Jialiang et al.
In: Journal of Applied Physics, Vol. 111, No. 10, 103503, 15.05.2012.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review