Jacob, K. T. ; Rajitha, G. ; Dasgupta, N. (2012) Electrical conductivity of Ca-doped YFeO3 Indian Journal of Engineering and Materials Sciences, 19 (1). pp. 47-53. ISSN 0971-4588
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Official URL: http://nopr.niscair.res.in/bitstream/123456789/137...
Abstract
Electrical conductivity and Seebeck coefficient of calcium-doped YFeO3, a potential cathode material in solid oxide fuel cells (SOFC), are measured as function of temperature and composition in air to resolve conflicts in the literature both on the nature of conduction (n- or p-type) and the types of defects (majority and the minority) present. Compositions of Y1-xCaxFeO3−δ with x = 0.0, 0.025, 0.05 and 0.1 are studied in the temperature range from 625 to 1250 K. All Y1-xCaxFeO3−δ samples show p-type semiconducting behaviour. Addition of Ca up to 5% dramatically increases the conductivity of YFeO3; increase is more gradual up to 10%. A second phase Ca2Fe2O5 appears in the microstructure for Ca concentrations in excess of 11%.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to National Institute of Science Communication and Information Resources. |
| Keywords: | Y1-xCaxFeO3−δ; Ca-doped Yttrium Ferrite; DC Electrical Conductivity; Seebeck Coefficient; Activation Energy |
| ID Code: | 95082 |
| Deposited On: | 30 Oct 2012 11:35 |
| Last Modified: | 30 Oct 2012 11:35 |
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