Tetragonal-to-tetragonal phase transition in lead-free (KxNa1-x)NbO3 (x = 0.11 and 0.17) crystals

Dabin Lin, Zhenrong Li, Fei Li, Changlong Cai, Weiguo Liu, Shujun Zhang

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Lead free piezoelectric crystals of (KxNa1-x)NbO3 (x = 0.11 and 0.17) have been grown by the modified Bridgman method. The structure and chemical composition of the obtained crystals were determined by X-ray diffraction (XRD) and electron probe microanalysis (EPMA). The domain structure evolution with increasing temperature for (KxNa1-x)NbO3 (x = 0.11 and 0.17) crystals was observed using polarized light microscopy (PLM), where distinguished changes of the domain structures were found to occur at 400 °C and 412 °C respectively, corresponding to the tetragonal to tetragonal phase transition temperatures. Dielectric measurements performed on (K0.11Na0.89)NbO3 crystals exhibited tetragonal to tetragonal and tetragonal to cubic phase transitions temperatures at 405 °C and 496 °C, respectively.

Original languageEnglish (US)
Pages (from-to)113-122
Number of pages10
JournalCrystals
Volume4
Issue number2
DOIs
StatePublished - Jun 10 2014

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

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