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 language | English |
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Pages (from-to) | 895-898 |
Number of pages | 4 |
Journal | Journal of Electroceramics |
Volume | 17 |
Issue number | 2-4 |
DOIs | |
Publication status | Published - 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