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Designing Sealing Glasses for Solid Oxide Fuel Cells

机译:设计用于固体氧化物燃料电池的密封玻璃

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Thermal and chemical properties of "invert" glasses and glass-ceramics developed for hermetic seals for solid oxide fuel cells are described. The glasses crystallize to form thermally stable pyro- and orthosilicate phases with the requisite thermal expansion match to the Y-stabilized ZrO_2 (YSZ) electrolyte. In addition, the glasses bond to Cr-steel substrates at 800-850 deg C without forming extensive interfacial reaction products. The thermal expansion characteristics of the glass-ceramics remain essentially unchanged after 28 days at 750 deg C. Compositions with lower (<= 2 mol percent) B_2O_3 contents exhibit the lowest volatilization rates when exposed to wet forming gas at 750 deg C.
机译:描述了为固体氧化物燃料电池的气密密封而开发的“倒置”玻璃和玻璃陶瓷的热和化学性质。玻璃结晶形成热稳定的焦硅酸盐和原硅酸盐相,其热膨胀与Y稳定的ZrO_2(YSZ)电解质相匹配。此外,玻璃在800-850摄氏度下粘结到Cr钢基底上,而不会形成大量的界面反应产物。玻璃陶瓷的热膨胀特性在750摄氏度下28天后基本保持不变。具有较低(<= 2 mol%)B_2O_3含量的组合物在750摄氏度下暴露于湿的成型气体中时,挥发速率最低。

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