Bulk diffusion of niobium in single-crystal titanium dioxide

Leigh R. Sheppard; Armand J. Atanacio; Tadeusz Bak; Janusz Nowotny; Kathryn E. Prince

doi:10.1021/jp0678709

Bulk diffusion of niobium in single-crystal titanium dioxide

Leigh R. Sheppard
, Armand J. Atanacio
, Tadeusz Bak
, Janusz Nowotny
, Kathryn E. Prince

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

The present work reports the tracer diffusion coefficient for ⁹³Nb in rutile TiO₂ single crystals using secondary ion mass spectrometry (SIMS). The determined tracer diffusion coefficient exhibited the following temperature dependence in air (p(O₂) = 21 kPa) over the range 1073-1573 K: D_93Nb = (4.7 m² s^_1) ×10^-7±04 exp ((-244 ± 9 kJ mol^-1)/RT) Through comparison to the self-diffusion of ⁴⁴Ti in rutile TiO ₂,⁹³Nb 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.

Original language	English
Pages (from-to)	8126-8130
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	111
Issue number	28
DOIs	https://doi.org/10.1021/jp0678709
Publication status	Published - 19 Jul 2007
Externally published	Yes

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@article{8c6268f5cce041d79535e240d2098962,

title = "Bulk diffusion of niobium in single-crystal titanium dioxide",

abstract = "The present work reports the tracer diffusion coefficient for 93Nb in rutile TiO2 single crystals using secondary ion mass spectrometry (SIMS). The determined tracer diffusion coefficient exhibited the following temperature dependence in air (p(O2) = 21 kPa) over the range 1073-1573 K: D93Nb = (4.7 m2 s\_1) ×10-7±04 exp ((-244 ± 9 kJ mol-1)/RT) Through comparison to the self-diffusion of 44Ti in rutile TiO 2,93Nb 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.",

author = "Sheppard, \{Leigh R.\} and Atanacio, \{Armand J.\} and Tadeusz Bak and Janusz Nowotny and Prince, \{Kathryn E.\}",

year = "2007",

month = jul,

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doi = "10.1021/jp0678709",

language = "English",

volume = "111",

pages = "8126--8130",

journal = "Journal of Physical Chemistry B",

issn = "1520-6106",

publisher = "American Chemical Society",

number = "28",

}

TY - JOUR

T1 - Bulk diffusion of niobium in single-crystal titanium dioxide

AU - Sheppard, Leigh R.

AU - Atanacio, Armand J.

AU - Bak, Tadeusz

AU - Nowotny, Janusz

AU - Prince, Kathryn E.

PY - 2007/7/19

Y1 - 2007/7/19

N2 - The present work reports the tracer diffusion coefficient for 93Nb in rutile TiO2 single crystals using secondary ion mass spectrometry (SIMS). The determined tracer diffusion coefficient exhibited the following temperature dependence in air (p(O2) = 21 kPa) over the range 1073-1573 K: D93Nb = (4.7 m2 s_1) ×10-7±04 exp ((-244 ± 9 kJ mol-1)/RT) Through comparison to the self-diffusion of 44Ti in rutile TiO 2,93Nb 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.

AB - The present work reports the tracer diffusion coefficient for 93Nb in rutile TiO2 single crystals using secondary ion mass spectrometry (SIMS). The determined tracer diffusion coefficient exhibited the following temperature dependence in air (p(O2) = 21 kPa) over the range 1073-1573 K: D93Nb = (4.7 m2 s_1) ×10-7±04 exp ((-244 ± 9 kJ mol-1)/RT) Through comparison to the self-diffusion of 44Ti in rutile TiO 2,93Nb 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.

UR - https://www.scopus.com/pages/publications/34547548237

U2 - 10.1021/jp0678709

DO - 10.1021/jp0678709

M3 - Article

AN - SCOPUS:34547548237

SN - 1520-6106

VL - 111

SP - 8126

EP - 8130

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 28

ER -

Bulk diffusion of niobium in single-crystal titanium dioxide

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