固体氧化物燃料电池封接玻璃在初期必须具备一定的流动性以便有效形成封接,进而保持足够的机械强度.它的热膨胀系数必须与燃料电池的其它部件相匹配,还需要具有化学稳定性.通过对研制的80多个逆性硅酸盐玻璃成分的分析,获得了成分-性能的一些规律:B2O3能够降低玻璃的软化温度和玻璃转变温度;ZnO通过拓宽玻璃转变温度和结晶温度之间的温度范围而改善封接性能,如Zn/Si比为0.7的成分可以获得230℃的温度范围;逆性玻璃的热膨胀系数取决于网络配体的平均势场强度,如加入BaO因为其较小的势场强度而提高玻璃的热膨胀系数,而加入势场强度较大的ZnO则呈现相反趋势.
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