Raman scattering and X-ray diffraction investigations of sol-gel derived SBN powders

Melanie M T Ho, Chee Leung Mak, K. H. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

Sol-gel derived SrxBa1-xNb2O6(SBN) powders were prepared at an annealing temperature of 1200°C. Their structural changes were characterized by Raman spectroscopy and X-ray diffractometry. Changes in the peak position and the relative intensity of the Raman spectra and X-ray patterns were examined for different values of x. Our results suggest that the SBN powders consist of a mixture of orthorhombic phase BaNb2O6(BN) and tetragonal tungsten-bronze phase (TTB) SBN powders for x<0·5, and orthorhombic phase SrNb2O6(SN) and TTB phase SBN powders for x0·5. Pure TTB type SBN powders with x≠0·5, however, were obtained at higher annealing temperatures. A possible formation route of the sol-gel derived SBN powder is discussed.
Original languageEnglish
Pages (from-to)1115-1118
Number of pages4
JournalJournal of the European Ceramic Society
Volume19
Issue number6-7
Publication statusPublished - 1 Jun 1999

Keywords

  • Dielectric properties.
  • Sol-gel processes
  • Spectroscopy
  • Strontium barium niobate
  • X-ray methods

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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