Intense atomic oxygen emission from incandescent zirconia

Katsuro Hayashi, Tetsuya Chiba, Jiang Li, Masahiro Hirano, Hideo Hosono

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6 Citations (Scopus)

Abstract

Particle emissions from an oxide-ion conducting solid electrolyte (tetragonal zirconia polycrystal, 3% Y 2O 3-doped ZrO 2) have been examined using a high vacuum evaluation system. Oxygen gas with a pressure range from 10 to 3 × 10 3 Pa was fed into a 2 mm outer diameter zirconia tube, whose central region of 10 mm length was heated to 1400-1800 °C by direct Joule heating. The emission species were identified by appearance potential spectroscopy using a quadrupole mass spectrometer. Atomic oxygen (AO) is the dominant species that is radiantly emitted from the high-temperature region. Temperature dependence of the AO emission intensity exhibits far less activation energy (̃0.3-1.0 and 0.7 eV, on average) than electric field-assisted thermal O - ion (̃2 eV) and electron (̃6 eV) emission from zirconia reported before. High AO emission flux (in the order of 10 17 atoms.cm -2.s -1) is promising for use as practical AO sources.

Original languageEnglish
Pages (from-to)9436-9439
Number of pages4
JournalJournal of Physical Chemistry C
Volume113
Issue number22
DOIs
Publication statusPublished - Jun 4 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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