Structure and ionic conductivity of Bi2O3 substituted with lanthanide oxides

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Verkerk, M.J. and Velde, G.M.H. van de and Burggraaf, A.J. and Helmholdt, R.B. (1982) Structure and ionic conductivity of Bi2O3 substituted with lanthanide oxides. Journal of Physics and Chemistry of Solids, 43 (12). pp. 1129-1136. ISSN 0022-3697

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Abstract:A neutron diffraction study was performed on (Bi2O3)O.80(Er2O3)0.20 in the temperature region of 300–1100 K. There is no long-range ordering of vacancies. It is concluded from diffuse scattering that at low temperatures short-range ordering appears, leading to the occurrence of relatively short Ln-O distances. At temperatures above 870 K the oxygen lattice disorders.

In the low temperature region of Bi2O3-Ln2O3 solid solutions with the δ-Bi2O3 structure the activation energy of the conductivity is determined by the strength of the Ln-O band. In the high temperature region the energy necessary for oxygen ions to migrate through the tetrahedron planes plays a role.
Item Type:Article
Copyright:© 1982 Elsevier Science
Link to this item:http://purl.utwente.nl/publications/68927
Official URL:http://dx.doi.org/10.1016/0022-3697(82)90141-X
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