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Diffusion and Conductivity Properties of Cerium Niobate by R.J. Packer; E.V. Tsipis; C.N. Munnings; V.V. Kharton; S.J. Skinner; J.R. Frade is a Materials Science article available to read on EtoBox.

What is Diffusion and Conductivity Properties of Cerium Niobate about?

The tracer diffusion coefficient (D ⁎ ) and the surface exchange coefficient (k ⁎ ) provide vital information for materials used in high temperature electrochemical devices (e.g. solid oxide fuel cells or oxygen permeation membranes). These values were established for the high temperature tetragonal scheelite structured CeNbO 4+δ (monoclinic fergusonite at room temperature), which is of interest due to its wide range of oxygen stoichiometries varying from stoichiometric CeNbO 4 to CeNbO 4.33 . Measurements of D ⁎ and k ⁎ were performed by the isotopic exchange/line scan technique with SIMS (secondary ion mass spectrometry) used to determine 18 O stable isotope depth distribution. This process was carried out between temperatures of 1073 K and 1173 K at 500 mbar of 16 O/ 18 O. These measurements were then correlated with oxide ion conductivity data previously determined from four probe d.c. and e.m.f. measurements using the Nernst-Einstein relation.

Who reads Diffusion and Conductivity Properties of Cerium Niobate?

Author

R.J. Packer; E.V. Tsipis; C.N. Munnings; V.V. Kharton; S.J. Skinner; J.R. Frade

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-2738)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)