Studies on phase evolution and electrical conductivity of barium doped gadolinium aluminate
DSpace at IIT Bombay
View Archive InfoField | Value | |
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
|
|