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 journalArticlepeer-review

    16 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
    • Condensed Matter Physics
    • Mechanics of Materials
    • Ceramics and Composites
    • Materials Chemistry
    • Electrical and Electronic Engineering

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