Microstructural control of the TiO2-SnO2 binary system and synthesis of SnO2 nanowhiskers by microwave irradiation

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4 Citations (Scopus)

Abstract

SnO2 single crystals (columnar crystals and silver grass-like nanowhiskers) were synthesized by selective microwave heating of a TiO 2-SnO2 mixture. The shape of the as-grown SnO2 crystals is strongly dependent on the atmosphere during microwave irradiation. This is due to the difference in growth mechanisms, as revealed by in-situ surface observation under microwave irradiation, in addition to scanning and transmission electron microscopy observations of irradiated specimens. In a N2 atmosphere, silver grass-like SnO2 nanowhiskers were obtained. On the other hand, columnar SnO2 crystals were obtained in air or an O2 atmosphere. Photoluminescence and absorption spectra of the as-grown SnO2 crystals were examined. Based on the analysis of a TiO2-SnO2 pellet, it was found that the bottom was selectively heated, and SnO2 sublimated by microwave irradiation. A density gradient texture of the sample pellet was formed.

Original languageEnglish
Pages (from-to)879-884
Number of pages6
JournalMaterials Transactions
Volume49
Issue number4
DOIs
Publication statusPublished - 2008 Apr

Keywords

  • Color center
  • Microstructural control
  • Selective microwave heating
  • SnO nanowhiskers
  • SnO single crystal
  • TiO- SnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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