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Studies on phase evolution and electrical conductivity of barium doped gadolinium aluminate

DSpace at IIT Bombay

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Title Studies on phase evolution and electrical conductivity of barium doped gadolinium aluminate
 
Creator SINHA, A
SHARMA, BP
GOPALAN, P
 
Subject Solid oxide fuel cell
Oxide ion conductor
Impedance spectroscopy
Gadolinium aluminate
Citrate gel
 
Description The phase evolution and electrical conductivity of barium doped GdAlO3 samples have been investigated. The Ba- doped compositions of GdAlO3 were prepared through citrate gel process. Analysis of the phases was carried out using X-ray diffraction (XRD). The morphology of the calcined powders was studied by scanning electron microscopy. The electrical conductivity of Gd1-xBaxAlO3-delta (x = 0-0.04) was measured using ac impedance spectroscopy as a function of temperature ranging from 300 to 1000 degrees C under air. The solid solubility of barium in GdAlO3 was found to be less than 4 mol%. The undissolved barium precipitated in the form of BaAl2O4 phase. The barium doped GdAlO3 powders obtained after calcination at 1000 degrees C was found to be porous agglomerate composed of nanocrystalline grains. The total electrical conductivity of Ba-doped GdAlO3 increased with increasing amounts of barium up to 2 mol% doping. (C) 2012 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE SA
 
Date 2014-10-14T17:47:45Z
2014-10-14T17:47:45Z
2012
 
Type Article
 
Identifier JOURNAL OF ALLOYS AND COMPOUNDS, 536204-209
http://dx.doi.org/10.1016/j.jallcom.2012.05.006
http://dspace.library.iitb.ac.in/jspui/handle/100/14606
 
Language en