7. Fast Anion-Conduction in Oxynitrides:Oxygen and Nitrogen Transport in (Y, Zr)-(O, N)

MARTIN KILO, MARCELA ANDREA TAYLOR, GÜNTER BORCHARDT, INES KAISER-BISCHOFF, HANS BOYSEN, CHRISTOPH RÖDEL AND MARTIN LERCH

Diffusion Fundamentals

Año: 2008 vol. 8 p. 1 - 7

1862-4138

Cation doped zirconium oxynitrides (for example zirconium oxide dopedwith yttrium oxide and nitrogen, 'YZrON'), having a fluorite-based structure, are suggestedto have fairly high nitrogen diffusivity, besides their high oxygen mobility. In thepresent work, the tracer-diffusion of nitrogen and oxygen was measured in single crystalline'YZrON'. Results are compared to the migration pathways and migration enthalpiesof nitrogen and oxygen ions as determined by elastic neutron diffraction studies. Excellentagreement of the measured activation enthalpies of nitrogen diffusion (about 2 eV)and oxygen diffusion (about 1 eV) determined by the two methods is found