Trivalent Cation Conduction in the Sc<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub>-Type Structure
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- ADACHI Gin-ya
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
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- KÖHLER Joachim
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
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- IMANAKA Nobuhito
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
Bibliographic Information
- Other Title
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- Trivalent Cation Conduction in the Sc2(WO4)3-Type Structure
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Description
<p>The electrical conductivity of the M2(WO4)3 (M = Rare Earth, In, Al) solid electrolyte series amounts to 3.2×10−6-6.5×10−5Ω−1cm−1 with corresponding activation energies of 44.1-91.0 kJ/mol. These electrical properties can be individually improved, as is exemplary shown for the case of Sc2(WO4)3 and A12(WO4)3, by the formation of mixed cationic tungstates of the type (Sc1−xMx)2(WO4)3 (M = In, Lu, Dy, Gd) and (Al1−xScx)2(WO4)3 solid solutions, respectively. The larger cations (rM3+>rsc3+ and rsc3+>rAl3+) act to expand the host lattice for an easier migration of the Sc3+ and Al3+ cations, respectively. Maximum enhanced conductivities of about 5 times (Sc3+ conductors) and 6 times (Al3+ conductors) have been observed. The trivalent cations (M) were quantitatively and qualitatively identified as mobile charge carrying species with a cationic transference number of t+ > 0.99. Scandium cations have been identified in (Scl−xMx(WO4)3 (M = In, Dy, Gd) as main charge carrying species, whereas in (Scl−xLux)2(WO4)3 and (Al1−xScx)2(WO4)3 the predominant charge carrier changes in dependence on the composition. The experimental procedure for the characterization of M2(WO4)3 and (Sc1−xMx)2(WO4)3 as trivalent cationic conducting solid electrolytes is also given.</p>
Journal
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- Electrochemistry
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Electrochemistry 67 (7), 744-751, 1999-07-05
The Electrochemical Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282752369933568
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- NII Article ID
- 10002567864
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- NII Book ID
- AN00151637
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- ISSN
- 21862451
- 13443542
- http://id.crossref.org/issn/13443542
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- NDL BIB ID
- 4786302
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Allowed