The small-signal A.C. response of β-PbF 2
1981; Elsevier BV; Volume: 5; Linguagem: Inglês
10.1016/0167-2738(81)90330-1
ISSN1872-7689
AutoresDonald R. Franceschetti, J. Schoonman, J. Ross Macdonald,
Tópico(s)Electrochemical Analysis and Applications
ResumoThe small-signal a.c. response of symmetrical cells with nominally pure or bismuth-doped β-PbF2 as solid electrolyte and Pt or Au electrodes has been studied at controlled oxygen pressures over the frequency range 10−4Hz to 50kHz for temperatures ranging from 25°C to 450°C. The results indicate that oxygen is present as a mobile impurity in β-PbF2 and in Pb1−xBixF2+x and participates in an electrode adsorption-reaction sequence. The data have been interpreted with the aid of three different, but related, equivalent circuits, one involving a constant-phase-angle element, the second a single finite-length Warburg element, and the third two finite-length Warburg elements. Nonlinear-least squares analysis of the complex admittance data yields the dependence of the circuit elements on temperature and oxygen pressure.
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