Bulk diffusion of niobium in single-crystal titanium dioxide

Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/1589

Title:	Bulk diffusion of niobium in single-crystal titanium dioxide
Authors:	Sheppard, LR Atanacio, AJ Bak, T Nowotny, J Prince, KE
Keywords:	Hydrogen Diffusion Niobium Monocrystals Titanium Mass spectroscopy
Issue Date:	19-Jul-2007
Publisher:	American Chemical Society
Citation:	Sheppard, L. R., Atanacio, A. J., Bak, T., Nowotny, J., & Prince, K. E. (2007). Bulk diffusion of niobium in single-crystal titanium dioxide. Journal of Physical Chemistry B, 111(28), 8126-8130. doi:10.1021/jp0678709
Abstract:	The present work reports the tracer diffusion coefficient for Nb-93 in rutile TiO2 single crystals using secondary ion mass spectrometry (SIMS). The determined tracer diffusion coefficient exhibited the following temperature dependence in air (p(O-2) = 21 kPa) over the range 1073-1573 K: D-93Nb= (4.7 m(2) s(-1)) x 10(-7 +/- 0.4) exp ((-244 +/- 9 kJ mol(-1))/RT) Through comparison to the self-diffusion of Ti-44 in rutile TiO2, Nb-93 is interpreted to diffuse via the interstitialcy mechanism. The obtained tracer diffusion data are useful for ensuring compositional control during the processing of Nb-doped TiO2-based semiconductors using solid-state reactions between Nb2O5 and TiO2. © 2007, American Chemical Society
Gov't Doc #:	1137
URI:	http://dx.doi.org/10.1021/jp0678709 http://apo.ansto.gov.au/dspace/handle/10238/1589
ISSN:	1520-6106
Appears in Collections:	Journal Articles

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