High-temperature glassy-ceramic sealants SiO_2-Al_2O_3-BaO-MgO and SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O for solid oxide electrochemical devices  

固体氧化物电化学装置用高温SiO_2-Al_2O_3-BaO-MgO和SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O玻璃陶瓷密封剂（英文）

作　　者：S.QI N.M.POROTNIKOVA M.V.ANANYEV A.V.KUZMIN V.A.EREMIN A.A.PANKRATOV N.G.MOLCHANOVA O.G.REZNITSKIKH A.S.FARLENKOV E.G.VOVKOTRUB Yu.P.ZAIKOV 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]Institute of High-Temperature Electrochemistry of UB RAS,Ekaterinburg 620137,Russia [3]Ural Federal University named after the First President of Russia B.N.Yeltsin,Ekaterinburg 620002,Russia

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第11期2916-2924,共9页中国有色金属学报（英文版）

基　　金：supported by the program “Fundamental research program for the development of the Arctic zone of the Russian Federation”;the Russian Foundation for Basic Research, project No. 14-29-04009;supported by Act 211 of Government of the Russian Federation, agreement No. 02.A03.21.0006;Russian President scholarship 2015-2017 CⅡ-1572.2015.1 and СⅡ-1663.2015.1;the co-worker of Research and Advanced Development in the framework of the project “Development and creation of high-technological manufactory of autonomic multipurpose power sources based of domestic high-technological solid oxide fuel cells” (No. 02.G25.31.0198 by 27.04.2016) under financial support of the Ministry of Education and Science of Russian Federation in accordance with Government of Russian Federation Decree by 09.04.2010 N 218

摘　　要：Glasses of the SiO_2-Al_2O_3-BaO-MgO and SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O systems were synthesized in the perspective to apply them as sealants in SOFC at operating temperatures of 700-900 °C. Thermal properties of the chosen glass compositions and their compatibility with the SOFC materials(YSZ-electrolyte and alloy-interconnector Crofer22 APU, 15Х25Т) were investigated by means of synchronic thermal analysis and high-temperature dilatometry. The elemental analysis was performed by atomic emission spectroscopy. The average values of the temperature coefficients of the linear extension are 10.0×10^(-6) °С^(-1) for glass 45%SiO_2-15%Al_2O_3-25%BaO-15%MgO and 9.5×10^(-6) °С^(-1) for glass 60%SiO_2-10%Al_2O_3-10%ZrO_2-5%CaO-15%Na_2O. The gluing microstructure in YSZ/glass/Crofer22 APU was studied by scanning electron microscopy. The crystallization process of silicate phases was revealed to occur in the SiO_2-Al_2O_3-BaO-MgO glass. The analysis of the crystallization products was performed by Raman spectroscopy and X-ray diffraction. Glassy ceramics was proved to possess better parameters in comparison with amorphous glass to be used as a sealant in electrochemical sensors and oxygen sensors. The SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O low-temperature amorphous glass can be applied in SOFC.制备了在燃料电池中作为密封剂使用的操作温度可达700~900°C的SiO_2-Al_2O_3-BaO-MgO和SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O系玻璃陶瓷。采用同步热分析和高温膨胀测量技术,对所研究的玻璃陶瓷的热性能和其与燃料电池用材料(YSZ电解质,合金连接器Crofer22APU,15Х25Т)的匹配性能进行研究。采用原子发射光谱对玻璃陶瓷的元素成分进行分析。结果表明,45%SiO_2-15%Al_2O_3-25%BaO-15%MgO陶瓷的线膨胀系数为10.0×10-6°C-1,60%SiO_2-10%Al_2O_3-10%ZrO_2-5%CaO-15%Na_2O的为9.5×10-6°C-1。采用扫描电镜对YSZ/玻璃陶瓷/Crofer22APU的界面结构进行分析。SiO_2-Al_2O_3-BaO-MgO玻璃中的硅酸盐相发生了晶化,采用拉曼光谱和X射线衍射对晶化产物进行了分析。与非晶玻璃相比,所研究的玻璃陶瓷作为电化学或氧传感器中的密封剂使用时具有更佳的性能指标。而SiO_2-Al_2O_3-ZrO_2-CaO-Na_2O低温非晶陶瓷可以作为燃料电池中的密封剂使用。

关 键 词：glassy-ceramic sealants SOFC YSZ Crofer22APU magnesium silicate 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ171.733[化学工程—玻璃工业]