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Electrical Behavior of Ca(UO2PO4)2.10.5H2O Films in Contact with the Generating Electrolytes

Published online by Cambridge University Press:  25 February 2011

Ramos Barrado J.R. ,
Benavente J ,
Bruque S.  and
Martinez M.
Ramos Barrado J.R.
Affiliation:
Departamento de Física Aplicada, Universidad de Mälaga., E-29071 Málaga, Spain
Benavente J
Affiliation:
Departamento de Física Aplicada, Universidad de Mälaga., E-29071 Málaga, Spain
Bruque S.
Affiliation:
Departamento de Qufmica Inorgánica. Facultad de Ciencias., Universidad de Málaga., E-29071 Mdlaga, Spain
Martinez M.
Affiliation:
Departamento de Qufmica Inorgánica. Facultad de Ciencias., Universidad de Málaga., E-29071 Mdlaga, Spain
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Abstract

The electrical response of a self -supported film (CaUP) in contact with different electrolyte media was studied by impedance spectroscopy for electrolyte concentrations ranging between 10−4 M and 10−2 M.The film was placed separating two aqueous solutions of the generating electrolytes, at the same concentrations, and two systems: i) UO2(NO3)2/CaUP/H3PO4; ii)Ca(NO3)2/CaUP/H3PO4, were considered.

The film equivalent circuit and characteristic parameters (Rf and Wf) for both systems were determined. Result show an important dependence of Rf values with concentration, whlckis related to the electrolyte invasion into the film matrix, but no significant changes in Wf values were found. Due to the film nature, the ionic diffusion process associated to this circuit element is mainly attributed to the protons.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 321
Copyright
Copyright © Materials Research Society 1993

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References

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