【摘要】 研究了应用于阳极支撑型的中温固体氧化物燃料电池(ITSOFC)密封的SrO-La2O3-Al2O3-B2O3-SiO2体系微晶玻璃不同组分的线膨胀率,结果表明当微晶玻璃粉组成SrCO328.14%(摩尔分数),La2O321.17%(摩尔分数),Al2O37.22%(摩尔分数),H2BO341.72%(摩尔分数),SiO21.76%(摩尔分数)(SLABS3)时,最符合ITSOFC密封要求。差热分析结果表明SLABS3的玻璃转变温度在670℃~760℃之间,结晶温度在813~840℃之间,玻璃软化点约在900℃,XRD测试表明微晶玻璃与Ni-La0.3Ce0.7O1.85(Ni-LDC)阳极化学相容性好,将微晶玻璃和Ni-LDC在850℃烧结100h后,SEM观察界面粘附性好,EPMA测试界面的元素含量结果表明,虽然阳极的Ce会向微晶玻璃扩散10μm的深度,但观察不到微晶玻璃的元素向Ni-LDC扩散现象。用SLABS3密封模拟电池,测试开路电压结果表明SLABS3的密封效果和稳定性良好。更多还原

【Abstract】 The linear expansion coefficient of SrO-La₂O₃-Al₂O₃-B₂O₃-SiO₂ sealing materials with different composition,which for anode supported intermediate temperature solid oxide fuel cells（ITSOFC） was studied.The crystallite content of SrCO₃ 28.14mol%,La₂O₃ 21.17mol%,Al₂O 7.223mol%,H₂BO₃ 41.72mol%,SiO₂ 1.76 mol%（SLABS3） met the requirements best.DTA analysis showed that the transition and crystallization temperature of SLABS3 was 670～760℃ and 813～840℃ respectively,but for the soften temperature was 900℃.XRD test demonstrated that there was no reaction between the crystallite glass and Ni-La₀.3Ce₀.7O₁.85（Ni-LDC）anode materials.SEM found that the glass bonded well with the anode after heat-treated at 850℃ for 100h and EPMA analysis demonstrated that although the Ce element would diffuse 10μm to the anode,none element of the crystallite glass was found to diffuse to the anode.The OCV of the simulated cell sealed with SLABS3 proved that the sealing results and stability were satisfied.更多还原