| 摘要 |
PURPOSE:To prevent the seal part of a fuel cell from being corroded so as to prevent degrading of the seal property and cell performance over a long period by providing seal members, which are constructed with ceramic woven or non woven fabric carrying powdered crystalized glass of a low melting point, between the side surfaces of the fuel cell body and the manifolds. CONSTITUTION:Seal members 5a to 5d inclusive, which are constructed with ceramic woven or non woven fabric carrying crystalized powdered glass of a low melting point are provided between the side surfaces of the body of a fuel cell and manifolds 6a to 6d inclusive. The aforesaid glass is softened at a temperature below the cell operation temperature, showing its fluidity, however, it is not corroded easily and has the property not to be mixed with molten carbonate. Furthermore it has the property to be crystalized at the cell operation temperature (about 650 deg.C), and it does not show its fluidity after it is once crystalized. It therefore becomes a complete gas seal member and the insulation property increases. The corrosion of separators 3 or manifolds 6a to 6d inclusive due to molten carbonate can be prevented, and the gas seal and electric insulation properties can be maintained for a long period by the use of such glass to be crystalized at a low temperature as described above. |
