Electron paramagnetic resonance of titanium impurities in reduced yttria-stabilized zirconia

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08422.x· OSTI ID:82588

Swider, K E; Worrell, W L ^[1]

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1. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering

The electronic defects in single crystals of yttria-stabilized have been zirconia (YSZ) have been examined using electron paramagnetic resonance (EPR). The EPR spectra of hydrogen-reduced YSZ single crystals are almost identical to those of polycrystalline yttria (12 mol%)-stabilized zirconia-titania, indicating that the Ti{sup 3+} cation is the predominant electronic defect in both materials. The disparity between the discoloration of the polycrystals and single crystals (blue vs yellow) is attributed to the different crystalline environments of the Ti{sup 3+} cations in the grain boundaries and lattice. The concentration of titanium cations in the YSZ single crystals (ca. 600 ppm) is probably too dilute to contribute to the electronic conductivity.

• Sponsoring Organization: USDOE
• OSTI ID: 82588
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL LATTICES
DEFECTS
ELECTRON SPIN RESONANCE
GRAIN BOUNDARIES
MONOCRYSTALS
POLYCRYSTALS
SOLID ELECTROLYTE FUEL CELLS
TITANIUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES