In 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 sintering of the glass powder takes 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 optimisation of the sealing conditions of the glasses. Dense materials have been characterised as well as the sintering mechanism.
