Preparation of pure perovskite-type BaSnO3 powders by the polymerized complex method at reduced temperature

Chandana Premakumara Udawatte, Masato Kakihana, Masahiro Yoshimura

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)

Abstract

Cubic perovskite-type pure barium stannate, BaSnO3, powders were prepared using the polymerized complex technique at the relatively low temperature of 600°C. SnCl4·xH2O was first dissolved in ethylene glycol (EG) and anhydrous citric acid (CA) was then added. After complete dissolution, BaCO3 powder was added and the mixture was stirred at 80°C for several hours until the solution became transparent, demonstrating the presence of Ba2+- and Sn4+-citric acid complexes. This solution, with molar ratio Ba/Sn/CA/EG = 1:1:10:40, was heated at 130°C to produce a yellowish transparent resin without any precipitation via polymerization with citric acid and ethylene glycol including the complexes. Pyrolysis of the resin at 350°C yielded a powder precursor of BaSnO3. X-ray diffraction and Raman analysis indicated the formation of pseudo-cubic BaSnO3 when the barium-tin precursor was heat treated in air at ≥ 600°C for 2 h. The product was identified as pseudo-cubic BaSnO3 with lattice parameter a0 = 0.4118±0.0003 nm. The powder formed at 800°C consisted of faceted microcrystals 80-100 nm in size.

Original languageEnglish
Pages (from-to)23-30
Number of pages8
JournalSolid State Ionics
Volume108
Issue number1-4
DOIs
Publication statusPublished - 1998 May 1
Externally publishedYes

Keywords

  • BaSnO
  • Polymerized complex
  • Powder
  • Raman
  • TG-DTA
  • XRD

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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