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Large electrostrictive effect in Sn-doped NBT-BT lead-free relaxor ceramics

  • W. P. Cao*
  • , J. Sheng
  • , Z. Liu
  • , C. Gao
  • , Z. H. Wang
  • , J. Wang
  • , J. Chang
  • , Z. Wang
  • , W. L. Li
  • *Corresponding author for this work
  • Harbin University of Commerce
  • Harbin Institute of Technology
  • State Grid of China Technology College

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we design and adjust the composition in (Na0.5Bi0.5)TiO3-BaTiO3 lead-free relaxor ferroelectrics by doping SnO2 to introduce a relaxor phase and accordingly obtain prominent lead-free electrostrictors. It was found that all the samples exhibited ideal features of relaxor ferroelectrics and the ferroelectric-relaxor phase transition temperature of the ceramics was adjusted to near or below room temperature after doping with a handful of Sn4+. A relatively high electrostrictive coefficient Q33 of 0.0293 m4/C2 was achieved for the composition with x = 0.08, which was attributed to the formation of relaxor pseudocubic phase developed by the Sn4+ substitution. These results provide some instructive thoughts for the further development of (Na0.5Bi0.5)TiO3-based electrostrictive materials by B-site doping.

Original languageEnglish
Article number2050100
JournalModern Physics Letters B
Volume34
Issue number11
DOIs
StatePublished - 20 Apr 2020

Keywords

  • NBT-BT ceramics
  • diffuse phase transition
  • electrostrictive effect

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