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    • 10. 发明申请
    • Compound for a solid oxide fuel cell stack gasket
    • 用于固体氧化物燃料电池堆叠垫片的化合物
    • US20060121327A1
    • 2006-06-08
    • US11003897
    • 2004-12-03
    • Joseph KellerWalter SymonsWilliam LaBarge
    • Joseph KellerWalter SymonsWilliam LaBarge
    • H01M2/08H01M8/10
    • H01M8/0282H01M2008/1293
    • In a solid-oxide fuel cell assembly comprising a plurality of components having electrically-conductive mating surfaces therebetween, the surfaces are sealed by an electrically insulating gasket that include a mineral composition comprising about 66 mol % MgO and about 33 mol % SiO2, the mineral composition being known mineralogically as forsterite. A brazing alloy may be applied to enhance bonding of the gasket into place. The gasket composition may include additions of Al2O3 to enhance electrical resistivity while having little to no impact of matching expansion coefficients of the gasket and metal mating surfaces. Also, additions such as titania or zirconia to inhibit glassy phase grain boundaries and the formation of impurities and pores in the ceramic grain boundaries may be used. A recommended particle size distribution of precursor powders is disclosed that leads to an optimum microstructure of the sintered gasket.
    • 在包括多个在其间具有导电配合表面的部件的固体氧化物燃料电池组件中,表面由电绝缘垫片密封,该电绝缘衬垫包括含有约66mol%MgO和约33mol%SiO 2的矿物组合物, 2矿物组合物在矿物学上被认为是镁橄榄石。 可以施加钎焊合金以增强垫圈的粘合到位。 垫圈组合物可以包括添加Al 2 O 3 3以提高电阻率,同时几乎不影响垫片和金属配合表面的膨胀系数的匹配。 此外,可以使用诸如二氧化钛或氧化锆的添加物来抑制玻璃相晶界和陶瓷晶界中杂质和孔的形成。 公开了推荐的前体粉末的粒度分布,其导致烧结垫片的最佳微观结构。