摘要
采用高温熔融法制备了Al_(2)O3-SiO_(2)-B_(2)O_(3)-Na_(2)O系玻璃密封材料,研究了Al_(2)O_(3)含量对Al_(2)O_(3)-SiO_(2)-B_(2)O_(3)-Na_(2)O玻璃材料密封性能的影响。同时应用FactSage热力学软件对该材料体系进行了相转变计算,对密封材料成分和相组成进行了设计优化。通过实验研究了Al_(2)O_(3)含量对玻璃密封材料热膨胀系数的影响,并将该密封材料应用于CeO_(2)基电解质固体氧化物燃料电池。结果表明,随着Al_(2)O_(3)含量从10 wt.%、20 wt.%增加到30 wt.%,玻璃密封材料的实际使用温度从700℃提高到780℃,热膨胀系数分别为11.25×10^(−6) K^(−1)、11.21×10^(−6) K^(−1)和11.15×10^(−6) K^(−1),与实验测得GDC电解质热膨胀系数10.94×10^(−6) K^(−1)相近,密封材料的稳定性较高,且封接单电池后电池测试结果良好。
Al_(2)O_(3)-SiO_(2)-B_(2)O_(3)-Na_(2)O system glass materials were prepared by using high-temperature melting method.The effect of Al_(2)O_(3) content on sealing performance of the Al_(2)O_(3)-SiO_(2)-B_(2)O_(3)-Na_(2)O glass materials was studied.At the same time,phase transition of the material system was calculated by using FactSage thermodynamic software to determine the content and phase composition of sealing materials with optimal performance.The effect of Al_(2)O_(3) on thermal expansion coefficient of the glass sealing materials was experimentally studied.The sealing material was applied to CeO_(2) based electrolyte of solid oxide fuel cells.The actual working temperature of the glass sealing material was increased from 700℃to 780℃,as the content of Al_(2)O_(3) was increased from 10 wt.%to 30 wt.%.The thermal expansion coefficients of the glass sealing materials were 11.25×10^(−6) K^(−1),11.21×10^(−6) K^(−1) and 11.15×10^(−6) K^(−1),respectively,which were close to that of GDC electrolyte(10.94×10^(−6) K^(−1)).The sealing material had high stability,which meet the requirements of IT-SOFCs sealing materials.
作者
李舒婷
彭军
刘媛媛
蔡长焜
安胜利
LI Shuting;PENG Jun;LIU Yuanyuan;CAI Changkun;AN Shengli(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices,Baotou 014010,Inner Mongolia,China;College of Chemistry and Chemical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)
出处
《陶瓷学报》
CAS
北大核心
2022年第5期934-942,共9页
Journal of Ceramics
基金
国家自然科学基金(51974167)。
