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Electronic/ionic conductivity and oxygen diffusion coefficient of Sr-Fe-Co-O system
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ma, Beihai Park, Jung-Hyun Balachandran, U. Poeppel R. B. Segre, Carlo U. |
| Copyright Year | 1995 |
| Abstract | Oxides in the system Sr-Fe-Co-O exhibit both electronic and ionic conductivities. Recently, Sr-Fe-Co-O system attracted great attention because of the potential to be used for oxygen permeable membranes that can operate without the electrodes or external electrical circuitry. Electronic and ionic conductivities at various temperatures have been measured on two compositions in Sr-Fe-Co-O system named SFC-1 and SFC-2. The electronic transference number is much greater than the ionic transference number in SFC-1 sample, while the electronic and ionic transference numbers are very close in SFC-2 sample. At 800{degrees}C, the electronic conductivity and ionic conductivity are {approx}76 S{center_dot}cm-1 and =4 S-cm-1, respectively, for SFC-1. While, for SFC-2, the electronic and ionic conductivities are =10 S-cm-1 and {approx}7 S-cm-1, respectively. By a local fitting to {sigma}{center_dot}T = A exp(-E{sub {alpha}}/{kappa}{Tau}), we found that the oxide ion activation energies are 0.92 eV and 0.37 eV respectively for SFC-1 and SFC-2 samples. Oxygen diffusion coefficient of SFC-2 is {approx}{times}10{sup {minus}7} cm{sup 2}/sec at 900C. |
| Starting Page | 49 |
| Ending Page | 49 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Volume Number | 393 |
| Alternate Webpage(s) | https://digital.library.unt.edu/ark:/67531/metadc735468/m2/1/high_res_d/80888.pdf |
| Alternate Webpage(s) | https://doi.org/10.1557/PROC-393-49 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
