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
DSpace at IIT Bombay
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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
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Creator |
OJHA, PK
RATH, SK CHONGDAR, TK GOKHALE, NM KULKARNI, AR |
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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 |
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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.
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Publisher |
ELSEVIER SCIENCE BV
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Date |
2012-06-26T07:29:36Z
2012-06-26T07:29:36Z 2011 |
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Type |
Article
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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 |
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Language |
English
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