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Physical and thermal behaviour of Sr-La-Al-B-Si based SOFC glass sealants as function of SrO content and B(2)O(3)/SiO(2) ratio in the matrix

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Title Physical and thermal behaviour of Sr-La-Al-B-Si based SOFC glass sealants as function of SrO content and B(2)O(3)/SiO(2) ratio in the matrix
 
Creator OJHA, PK
RATH, SK
CHONGDAR, TK
GOKHALE, NM
KULKARNI, AR
 
Subject OXIDE FUEL-CELLS
NETWORK STRUCTURE
SEALING GLASSES
INTERCONNECT
Network structure
Modifier
Glass transition temperature
Dilatometric softening point
Coefficient of thermal expansion
Solid oxide fuel cell
 
Description A series of SOFC glass sealants with composition SrO (x), La(2)O(3) (15), Al(2)O(3) (15), B(2)O(3) (40 - x), and SiO(2) (30) [x = 10, 15, 20, 25 and 30] (wt.%) [SLABS] are investigated for their structure property correlations at different compositions. Quantitative Fourier transform infrared spectroscopy shows structural rigidity with increasing SrO content, as demonstrate by an increase in the Si-O-Si/O-Si-O bending and B-O-B stretching frequencies. The role of SrO as a modifier dominates the control of the structure and behaviour of glasses compared with the effect of network formers, i.e., the B(2)O(3)/SiO(2) ratio. Consequent to the structural changes, increasing substitution of B(2)O(3) by SrO the glasses causes increases in the density, glass transition temperature and dilatometric softening point. On the other hand, the crystallization temperatures show a decreasing trend and the coefficient of thermal expansion increases with increase in substitution. (C) 2011 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2012-06-26T07:29:36Z
2012-06-26T07:29:36Z
2011
 
Type Article
 
Identifier JOURNAL OF POWER SOURCES,196(10)4594-4598
0378-7753
http://dx.doi.org/10.1016/j.jpowsour.2011.01.021
http://dspace.library.iitb.ac.in/jspui/handle/100/14138
 
Language English