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Trivalent Scandium Ion Conduction in the Scandium Tungstate–alumina Composites by N Imanaka; Y Okazaki; Y Kobayashi; S Tamura; T Asano; T Egawa; G Adachi is a Materials Science article available to read on EtoBox.

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The Al O mixed with Sc (WO ) composites were synthesized and their ionic conducting characteristics were studied. 2 3 2 4 3 The maximum electrical conductivity was attained for the composite of 0.9Sc (WO ) -0.1Al O . From the electrical 2 4 3 2 3 conductivity measurements at various oxygen pressures and polarization phenomena, the mobile species in the composite was identified to be only ionic and also the oxide anion was eliminated from the candidates of conducting ion species in the 31 composite. Among the remainders of the candidate cationic species, the mobile ion was verified to be only Sc ion and the 61 31 rest of the cations W and Al , were found to function as a lattice-forming ion with oxide anions and the insulating oxide constituent, respectively. Here, one of the suitable techniques to enhance the ionic conducting properties was clearly demonstrated by forming a composite with a trivalent ion conductor and a refractory oxide insulator and the relation between 31 the relative density of the composites and the Sc ion conductivity was explicitly clarified.

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Author

N Imanaka; Y Okazaki; Y Kobayashi; S Tamura; T Asano; T Egawa; G Adachi

Publisher

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

Published

1999

Language

EN

Field

Materials Science (Physical Sciences)