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Título

Sintering process of glasses in the system Na2O–B2O3–SiO2

Autor Pascual, M. Jesús; Durán, Alicia; Pascual, Luis
Fecha de publicación 2002
EditorElsevier
Citación Journal of Non-Crystalline Solids 306 (2002) 58–69
ResumenIn this work, the sintering process of different glasses in the system Na2O–B2O3–SiO2 has been studied. The studied compositions are suitable for sealing the gas manifolds of molten carbonate fuel cells. Sealing glasses are usually applied on the surfaces to be sealed using powder glass mixed with an organic medium. The agglomerant elimination and the sintering of the glass powder take place during the thermal treatment. Three different particle sizes of glass powder and different sintering temperatures and times have been used to reveal the influence of the specific surface area and viscosity on sintering. The control of these parameters allows optimization of the sealing conditions of the glasses. Dense materials have been characterized as well as the sintering mechanism. Two processes take place during the thermal treatment: the sintering process and the quartz crystallisation. Both processes act in opposite directions on the glass densification. Crystallisation is the dominant process at long times and high temperatures. The viscous flow Scherer model has been adequately applied to the experimental data.
Versión del editorhttp://dx.doi.org/10.1016/S0022-3093(02)01049-9
URI http://hdl.handle.net/10261/32908
DOI10.1016/S0022-3093(02)01049-9
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