Hydrothermal preparation and characterization of sheet-like (KxNa1-x)NbO3perovskites

Deqing Zhang, Zhangjie Cheng, Junye Cheng, Feng Shi, Xiuying Yang, Guangping Zheng, Maosheng Cao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)


(KxNa1-x)NbO3(KNN) powders with sheet-like morphologies were successfully prepared by the hydrothermal synthesis route combined with subsequent heat-treatment processes. When the heat-treated temperature was 600 °C, the (KxNa1-x) NbO3(0.6≤x≤0.7) perovskite sheets were obtained in the KNN powders. The surface morphology and crystal structure of the KNN sheets were investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM), respectively. The KNN sheets were in a well-defined hexagonal shape with a thickness of about 100-200 nm and a diameter of 1.5-3 μm. The chemical structure of the KNN sheets was analyzed using Fourier Transform infrared spectroscopy (FTIR) and Raman spectroscopy. A growth mechanism for the sheet-like microstructures was discussed.
Original languageEnglish
Pages (from-to)9073-9078
Number of pages6
JournalCeramics International
Issue number7
Publication statusPublished - 15 May 2016


  • Heat treatment
  • Hydrothermal synthesis
  • Lead-free piezoelectrics
  • Perovskite sheets

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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