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| Title: | Ionic conductivity of Na2SO4-Al2O3 composite electrolytes: Mechanism and the role of the preparatory parameters |
| Authors: | JAIN, A
SAHA, S
GOPALAN, P
KULKARNI, A |
| Keywords: | surface induced defects
space-charge regions
electrical-conductivity
solid electrolytes
2-phase systems
enhancement
transport
phase
agl-al2o3
chemistry |
| Issue Date: | 2000 |
| Publisher: | ACADEMIC PRESS INC |
| Citation: | JOURNAL OF SOLID STATE CHEMISTRY, 153(2), 287-293 |
| Abstract: | A moderate increase in the electrical conductivity of sodium sulfate has been obtained by dispersing alumina particles. The largest enhancement in conductivity for furnace-cooled samples is observed for 5.5 and 35 m/o alpha-Al2O3 compositions. For 35 m/o composition, the conductivity increases by more than 1 order of magnitude at 400 degrees C and 2 orders of magnitude at 200 degrees C. In contrast to the understanding based on many composite electrolyte theories, 0.004 mu m alumina brings about the same or even lower enhancement in conductivity as 0.5 mu m alumina. Furthermore, contrary to expectations, negligible enhancement is observed when gamma-Al2O3 is employed. The maximum enhancement in this study is observed for the 4 m/o Al2O3 quenched sample: the conductivity increases by 2 orders for the high-temperature phase and by more than 3 orders for the low-temperature phase, (C) 2000 |
| URI: | http://dx.doi.org/10.1006/jssc.2000.8764
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3327
http://hdl.handle.net/10054/3327 |
| ISSN: | 0022-4596 |
| Appears in Collections: | Article
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