Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 26    No. 11    November 2016

[PDF Download]        

    

High-temperature glassy-ceramic sealants SiO2-Al2O3-BaO-MgO and SiO2-Al2O3-ZrO2-CaO-Na2O for solid oxide electrochemical devices
S. Qi1, N. M. Porotnikova2,3, M. V. Ananyev2,3, A. V. Kuzmin2,3, V. A. Eremin2,3, A. A. Pankratov2, N. G. Molchanova2, O. G. Reznitskikh2, A. S. Farlenkov2,3, E. G. Vovkotrub2, Yu. P. Zaikov2,3

1. College of Material Sciences and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
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

Abstract:Glasses of the SiO2-Al2O3-BaO-MgO and SiO2-Al2O3-ZrO2-CaO-Na2O 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 Crofer22APU, 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%SiO2- 15%Al2O3-25%BaO-15%MgO and 9.5×10-6 °С-1 for glass 60%SiO2-10%Al2O3-10%ZrO2-5%CaO-15%Na2O. The gluing microstructure in YSZ/glass/Crofer22APU was studied by scanning electron microscopy. The crystallization process of silicate phases was revealed to occur in the SiO2-Al2O3-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 SiO2-Al2O3-ZrO2-CaO-Na2O low-temperature amorphous glass can be applied in SOFC.

 

Key words: glassy-ceramic sealants; SOFC; YSZ; Crofer22APU; magnesium silicate

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com