Synthesis And Properties Of Borate Glass For IT-SOFC Sealing Materials

System for IT-borate glass is the main research directions at home and abroad, this study first reading lots of documents selected on the basis of barium borate glasses （BAS）, calcium borate glass （CAS） and barium calcium borate salt glass （BCAS） as the basis for system selection, the experimental material from sealing the minimum required match of thermal expansion, sealing temperature suitable for research and screening, obtained BCAS system more suitable for sealing materials, while This article discusses the different barium calcium content and the expansion coefficient of glass sealing temperature, the result is: With the increase of barium content, increase in expansion coefficient of glass; barium content on the glass softening temperature （Ts）, glass transition temperature （ Tg）, sealing temperature （T4） was less affected.Borosilicate glass ratio of borate is an important factor, this experiment sealing material from the most basic conditions required that a suitable sealing temperature, as well as with other components of the battery to investigate the thermal expansion match to draw the most suitable boron-silicon molar ratio. This study focused on the borosilicate 0.3,0.35,0.4,0.5 molar ratio of the four cases. Reached the following conclusions: With the increase of molar ratio of borosilicate glass softening temperature （Ts）, glass transition temperature （Tg）, sealing temperature （T4） have declined, while thermal expansion coefficient also showed a substantial downward trend, Based on our work to meet the required temperature of 800℃in the temperature of the anode supported solid oxide fuel cell sealing materials, drawn borosilicate sealing ratio of 0.35, the best, then the glass transition temperature Tg is 614℃, Glass began softening temperature of 750℃, start the crystallization temperature is 834℃, sealing temperature is 895℃; glass thermal expansion changes in stability and in the sealing process of the glass thermal expansion coefficient ranging from 10.5×10^-6K^-1 12.1×10^-6K^-1 can be a good match with the anode.Obtained through the study and BCAS35 BCAS5 are two very suitable as a working temperature of 800℃in the temperature of the anode supported solid oxide fuel cell sealing materials. In this study, further study some of their related properties. The results showed that: the size of glass powder of glass, plastic seal is an important factor in the experiment obtained the most suitable milling 8h; through thermal expansion coefficient of the anode that BCAS35 glass fitting glass is more than BCAS5 match, sealing inerface by SEM found BCAS35 glass and the anode, cathode, electrolyte, and a combination of stainless steel connecting plates are very good; will BCAS35 glass powder used for sealing alumina ceramic tubes and a single cell obtained by testing a single cell voltage of 1.1V, further explanation BCAS35 is available for work at 800℃in temperature anode supported solid oxide fuel cell sealing materials.