Studies on Sio2 Bao Zno M2o3 X B2o3 1 X M Al Mn Y La Based Glass Sealants

Abstract

The search of alternate energy source has led to development of secondary energy newlinegenerating units. Among these, fuel cell is one, which is in demand to supply energy at newlinesource. Depending upon need and requirement, several types of fuel cells have been newlinedeveloped. newlineBased on electrolyte used, fuel cells have been categorized in five different newlinecategories. Among these solid oxide fuel cell (SOFC) has a number of advantages when newlinecompared with other categories of fuel cells (environmentally friendly, fuel flexibility, newlinecost effectiveness and higher efficiency). Apart from these the corrosion problem in newlineSOFC is reduced to minimum extent because of the use of ceramic solid-phase newlineelectrolyte. On the other hand, SOFC has number of disadvantages like high operating newlinetemperature (800oC-1000oC) and because of this there is less capability with other newlinecomponents used in SOFC. The current need is to lower the operating temperature newline(550oC-850oC) of SOFC. SOFC consists of electrodes, electrolyte, interconnect and newlinesealant as its components. Among the four designs of SOFC the flat plate and tubular newlinedesign have been studied in detail because of its better properties as compared to newlinesegmented-cell-in-series and monolithic design. As is evident from the name, sealless newlinetubular design needs no seals; therefore, the problems with the gastight seals for ceramics newlineat high temperatures are eliminated. The disadvantage of sealless tubular design is that it newlinehas relatively long current path through the cell, resulting in greater resistive loss. On the newlineother hand the flat-plate design offers simpler fabrication and in plane conduction. newlineHowever, the need of effective and high temperature seal to prevent the fuel leakage and newlineair mixing is the urgent requirement of the planar design. The present study is done on newlinesealant as it is important part of SOFC which is used to seal all components of SOFC. In newlineother words it comes in direct contact with all the other components of SOFC.