Synthesis of lead-free (K, Na)(Nb, Ta)O 3 nanopowders using a sol-gel process

Dodla Rajesh, Seungwook Kim, Jinhoo Jeong, Sahn Nahm, Woong Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lead-free (K 0.5Na 0.5)(Nb 0.7Ta 0.3)O 3 piezoelectric material was successfully synthesized via a sol-gel process. Crystalline (K 0.5Na 0.5)(Nb 0.7Ta 0.3)O 3 nanopowders were obtained after heat treatment at 700 °C. The particle size was estimated to be 87nm±23 nm. The transmission electron microscopy images showed that individual nanoparticles were single crystalline and had a pseudo-cubic structure with a lattice parameter of ∼3.96 Å. Both X-ray diffraction and scanning electron microscopy studies consistently showed that the crystallization of the (K 0.5Na 0.5)(Nb 0.7Ta 0.3)O 3 occurred slightly above 500 °C. The samples have an appropriate stoichiometry as found via energy dispersive X-ray spectroscopy. The demonstration of the synthesis of (K 0.5Na 0.5)(Nb 0.7Ta 0.3)O 3 via a sol-gel process as presented in this paper can provide an important foundation for the development of a synthetic route towards (K 0.5Na 0.5) (Nb 0.7Ta 0.3)O 3 doped with various other elements for high performance piezoelectric devices.

Original languageEnglish
Pages (from-to)3555-3558
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number4
DOIs
Publication statusPublished - 2012 Jul 6

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Keywords

  • Lead-free
  • Nanopowder
  • Piezoelectric
  • Sol-gel process

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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