Synthesis and structural study of the KNb4O6-type compound

Wataru Sugimoto, Ken Mimuro, Yoshiyuki Sugahara, Kazuyuki Kuroda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Polycrystalline samples with nominal compositions K1+xNb4O6 (0≤x≤1.0) were prepared by the solid-state reaction of KNbO3, Nb2O5 and Mb. Powder X-ray diffraction analysis revealed that the KNb4O6-type compound was obtained as the major phase when x≥0.4. Transmission electron microscopy observations showed that when x=0.4, the KNb4O6-type compound contained intergrowth defects. In contrast, when x=1.0, practically no intergrowth defects were observed, although this sample contained KNbO3 as an impurity phase. The relation between the nominal composition and the formation of the intergrowth defects is discussed.

Original languageEnglish
Pages (from-to)318-321
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume107
Issue number4
Publication statusPublished - 1999 Jan 1

Keywords

  • Intergrowth defects
  • Perovskite
  • Reduced niobate
  • Rietveld analysis
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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