Evolution and characterization of fluorite-like nano-SrBi2Nb2O9 phase in the SrO-Bi2O3-Nb2O 5-Li2B4O7 glass system

N. Syam Prasad, K. B.R. Varma, Y. Takahashi, Y. Benino, T. Fujiwara, T. Komatsu

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Transparent glasses of various compositions in the system (100-x)Li2B4O7-x (SrO-Bi2O3-Nb2O5) (where x=10, 20, 30, 40, 50 and 60, in molar ratio) were fabricated via splat quenching technique. The glassy nature of the as-quenched samples was established by differential thermal analyses. X-ray powder diffraction (XRD) and transmission electron microscopic studies confirmed the amorphous nature of the as-quenched and crystallinity in the heat-treated samples. Fluorite phase formation prior to the perovskite SrBi2Nb2O9 phase was analyzed by both the XRD and high-resolution transmission electron microscopy. Dielectric and the optical properties (transmission, optical band gap and Urbach energy) of these samples have been found to be compositional dependent. Refractive index was measured and compared with the values predicted by Wemple-Didomemenico and Gladstone-Dale relations. The glass nanocomposites comprising nanometer-sized crystallites of fluorite phase were found to be nonlinear optic active.

Original languageEnglish
Pages (from-to)209-215
Number of pages7
JournalJournal of Solid State Chemistry
Volume173
Issue number1
DOIs
Publication statusPublished - Jun 2003
Externally publishedYes

Keywords

  • Dielectric
  • Ferroelectric
  • Fluoride like phase
  • Glassnanocomposites
  • Second harmonic generation
  • SrBiNbO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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