Hydrothermal synthesis of sodium and potassium niobates fine particles and their application to lead-free piezoelectric material

Kiyoshi Kanie, Yoshiki Numamoto, Shintaro Tsukamoto, Hirofumi Takahashi, Hideto Mizutani, Atsuki Terabe, Masafumi Nakaya, Junji Tani, Atsushi Muramatsu

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Cubic-shaped potassium and sodium niobates fine particles with orthorhombic crystal structures were successfully obtained by two-step hydrothermal reaction at 100°C for 24 h and 150-250°C for 3 h using a highly concentrated KOH or NaOH aqueous solution and a niobium pentachloride aqueous solution. The particle mean sizes were gradually controlled by changing the initial KOH and NaOH concentrations. Preheating of the precursor solution at 100°C for 24 h played an important role to obtain the desired alkali metal niobates fine particles with flat and smooth surfaces. The present potassium niobate fine particles exhibited good sintering property keeping with the original particle size and shape. Furthermore, thus obtained KN ceramics showed high piezoelectric properties.

Original languageEnglish
Pages (from-to)2119-2125
Number of pages7
JournalMaterials Transactions
Volume52
Issue number11
DOIs
Publication statusPublished - 2011

Keywords

  • Fine particle
  • Hydrothermal synthesis
  • Lead free
  • Perovskite
  • Piezoelectricity
  • Potassium niobate
  • Sodium niobate

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Hydrothermal synthesis of sodium and potassium niobates fine particles and their application to lead-free piezoelectric material'. Together they form a unique fingerprint.

Cite this