Defects and Transport Properties in TiNb2O7 |
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Authors: | Wen Xing Liv‐Elisif Kalland Zuoan Li Reidar Haugsrud |
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Affiliation: | Department of Chemistry, University of Oslo, Centre for Materials Science and Nanotechnology, FERMiO, , Oslo, NO‐0349 Norway |
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Abstract: | The electrical conductivity of TiNb2O7 was characterized as a function of temperature, and . The total conductivity was independent of in the low oxygen partial pressure regime, while a dependency of was observed at higher oxygen partial pressures. The conductivity increased with increasing under oxidizing conditions below 700°C. Mixed electronic and protonic conduction was indicated by H/D isotope exchange and transport number measurements. A defect model based on interstitial type of hydration was established and fitted to the conductivity data allowing for determination of physicochemical parameters of hydration and electron migration. |
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