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Ionic conductivity of Na2SO4-Al2O3 composite electrolytes: Mechanism and the role of the preparatory parameters

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Title Ionic conductivity of Na2SO4-Al2O3 composite electrolytes: Mechanism and the role of the preparatory parameters
 
Creator JAIN, A
SAHA, S
GOPALAN, P
KULKARNI, A
 
Subject surface induced defects
space-charge regions
electrical-conductivity
solid electrolytes
2-phase systems
enhancement
transport
phase
agl-al2o3
chemistry
ionic conductivity
composite electrolytes
role of preparatory parameters
conductivity mechanism in na2so4-al2o3 systems
 
Description 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
 
Publisher ACADEMIC PRESS INC
 
Date 2011-07-12T12:36:19Z
2011-12-26T12:48:53Z
2011-12-27T05:34:23Z
2011-07-12T12:36:19Z
2011-12-26T12:48:53Z
2011-12-27T05:34:23Z
2000
 
Type Article
 
Identifier JOURNAL OF SOLID STATE CHEMISTRY, 153(2), 287-293
0022-4596
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
 
Language en