Sellos vítreos y vitrocerámicos para pilas de combustible de óxido sólido (SOFC)
2003; Elsevier BV; Volume: 42; Issue: 3 Linguagem: Inglês
ISSN
2173-0431
AutoresC. Lara, María J. Pascual, Alicia Durán,
Tópico(s)Advancements in Solid Oxide Fuel Cells
ResumoFuel cells convert the chemical energy of a reaction into electrical energy in a continuous and direct way. The modular construction, noise and vibration absences, operating flexibility, much lower pollutants production and higher conversion efficiency make these devices very attractive for the future of energy sector. Among the different ongoing fuel cells, planar solid oxide fuel cell (SOFC) are very promising, The operation temperature is in the region of 800°C and they are specially aimed for electricity generation in small decentralized units. However, their price is not competitive yet in comparison with conventional technology because of several problems related to materials optimization. One of the important challenges is referred to the attainment of a seal that ensures the gas-tightness of the SOFCs at the operating temperature. Classes or glass-ceramics are the most adecuated materials to fulfil the sealing requirements for this application. In the present paper a worldwide overview is given outlining the different glasses and glass-ceramics employed On the sealing of SOFC so far, as well as their properties, advantages and drawbacks and a brief description about the SOFC technology. Finally, preparation and characterization to glass-ceramics from the system SiO 2 -BaO-RO-Al 2 O 3 is put forward as possible candidates for sealing SOFC.
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