Preparation of SnO2 whiskers via the decomposition of tin oxalate

Ki Won Kim, Pyeong Seok Cho, Jong Heun Lee, Seong Hyeon Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A new method for preparing SnO2 whiskers by the decomposition of SnC2O4 is suggested. A Whisker-like morphology of a SnC2O4 precipitate was attained via the gradual addition of an oxalic acid solution to a hot SnCl2 aqueous solution (T > 50°C). In comparison, when the solution temperature was either lower than 50°C or when ethanol was used as the solvent, the SnC2O 4 precipitate showed an angular and relatively isotropic morphology. The morphology of the SnC2O4 precipitate remained even after its thermal decomposition into SnO2 at 400°C indicating that SnC2O4 precipitation is a key step in preparing the whiskers. The formation mechanism of SnO2 whiskers was explained by the supersaturation during the precipitation of SnC2O4.

Original languageEnglish
Pages (from-to)895-898
Number of pages4
JournalJournal of Electroceramics
Volume17
Issue number2-4
DOIs
Publication statusPublished - 2006 Dec

Keywords

  • Gas sensor
  • Orthorhombic phase
  • SnCO
  • SnO whisker

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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