Boosted piezoelectricity with excellent thermal stability in tetragonal NaNbO3-based ceramics

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

4 Scopus Citations
View graph of relations

Author(s)

  • Lu Wang
  • Shengdong Sun
  • Huajie Luo
  • Hui Liu
  • Xianran Xing
  • Jun Chen

Detail(s)

Original languageEnglish
Pages (from-to)2367-2374
Journal / PublicationJournal of Materials Chemistry A
Volume9
Issue number4
Online published17 Dec 2020
Publication statusPublished - 28 Jan 2021
Externally publishedYes

Abstract

The realization of high piezoelectric performance and excellent temperature stability simultaneously in Pb-free ceramics is the key for replacing Pb-containing perovskites in the industry. In this study, large piezoelectric performance (d33 = 354 pC N−1) was achieved in a wide temperature sinterable potassium-free NaNbO3-BaTiO3-BaSnOsystem, which is twice more than the piezoelectricity found in NaNbO3-BaTiObinary ceramics. Structural refinement of high-energy synchrotron powder diffraction data suggests a single tetragonal structure with P4bm symmetry for the studied NaNbO3-based Pb-free ceramic. The results indicate that the small axial ratio favoring polarization reorientation benefits strong piezoelectricity, while the large oxygen octahedron tilt enhances the stability of the P4bm structure during the changing temperature according to the in situ high-energy synchrotron X-ray diffraction measurements and provides the foundation for the excellent thermal stability (20-100 °C) of the piezoelectric properties. A single tetragonal phase with a tiny axial ratio and large oxygen octahedron tilt effectively balances the piezoelectricity and thermal stability in Pb-free systems.

Citation Format(s)

Boosted piezoelectricity with excellent thermal stability in tetragonal NaNbO3-based ceramics. / Wang, Lu; Sun, Shengdong; Luo, Huajie; Ren, Yang; Liu, Hui; Xing, Xianran; Chen, Jun.

In: Journal of Materials Chemistry A, Vol. 9, No. 4, 28.01.2021, p. 2367-2374.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review