Niobium diffusion in niobium-doped titanium dioxide

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dc.contributor.authorSheppard, LRen_AU
dc.contributor.authorAtanacio, AJen_AU
dc.contributor.authorBak, Ten_AU
dc.contributor.authorNowotny, Jen_AU
dc.contributor.authorNowotny, MKen_AU
dc.contributor.authorPrince, KEen_AU
dc.date.accessioned2009-09-01T05:18:50Zen_AU
dc.date.accessioned2010-04-30T05:04:36Zen_AU
dc.date.available2009-09-01T05:18:50Zen_AU
dc.date.available2010-04-30T05:04:36Zen_AU
dc.date.issued2009-07en_AU
dc.date.statistics2009-07en_AU
dc.description.abstractThe present work studied the self-diffusion coefficient of Nb-93 in Nb-doped TiO2 single crystal (4.3 at.% Nb) at high oxygen activity [p(O-2) = 21 kPa] over the temperature range 1,073 to 1,573 K. The diffusion-induced Nb-93 concentration profile was determined by using secondary ion mass spectrometry (SIMS). The subsequently determined self-diffusion coefficient of 93Nb exhibits the following temperature dependence: D-93Nb - 1.77 x 10(-9) m(2) s(-1) exp(-197 +/- 9 kJ mol(-1)/RT). This study builds upon a similar study performed previously for Nb-93 tracer diffusion in undoped TiO2, and identifies the effect of compositional change on self-diffusion behaviour. The obtained activation energy has been considered in terms of migration and formation enthalpies of titanium vacancies. © 2009, Springer.en_AU
dc.identifier.citationSheppard, L. R., Atanacio, A. J., Bak, T., Nowotny, J., Nowotny, M. K., & Prince, K. E. (2009). Niobium diffusion in niobium-doped titanium dioxide. Journal of Solid State Electrochemistry, 13(7), 1115-1121. doi:10.1007/s10008-008-0717-xen_AU
dc.identifier.govdoc1300en_AU
dc.identifier.issn1432-8488en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleJournal of Solid State Electrochemistryen_AU
dc.identifier.pagination1115-1121en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s10008-008-0717-xen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1790en_AU
dc.identifier.volume13en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectNiobiumen_AU
dc.subjectTitaniumen_AU
dc.subjectDiffusionen_AU
dc.subjectCrystal dopingen_AU
dc.subjectMonocrystalsen_AU
dc.subjectOxidationen_AU
dc.titleNiobium diffusion in niobium-doped titanium dioxideen_AU
dc.typeJournal Articleen_AU
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