平板式SOFCAg-CuO-Al_2TiO_5封接材料的研究  

Study on Ag-CuO-Al_2TiO_5 sealing material for planer SOFC

作　　者：刘泳良[1] 屠恒勇[1] 

机构地区：[1]上海交通大学燃料电池研究所,上海200240

出　　处：《电源技术》2014年第3期454-457,共4页Chinese Journal of Power Sources

基　　金：国家重点基础研究发展计划(2012CB215400)

摘　　要：在Ag-CuO中加入低膨胀系数的Al2TiO5颗粒构成复合钎料,采用空气反应钎焊技术（RAB）封接连接体SUS430和阳极Ni-YSZ支撑固体氧化物燃料电池单电池.进行泄露率测定、100 h老化和热循环等实验,并用扫描电镜和能谱仪等对封接的气密性、抗氧化能力、热循环性能和微观结构进行了研究.Al2TiO5颗粒在复合钎料中分布均匀,接头性能得到了提高,该颗粒能促进CuO向界面迁移,通过增加其含量并减少CuO含量有望提高焊缝的抗氧化能力.泄漏率小于0.001 mL/（min ·cm）,在工作100 h和经历8次热循环（400～800℃）后,开路电压均无下降,表明Ag-8 CuO-2 Al2TiO5复合钎料能有效封接连接体和阳极Ni-YSZ,支撑单电池.Low thermal expansion ceramic, AI2TiOs particles were added to Ag-CuO as to produce a composite braze. The material was used to seal and interconnect the SUS430 membrane and the NiO-YSZ anode by reactive air brazing （RAB）.leakage rate test, 100 h aging test and thermal cycle test was conducted, and SEM and EDX was tested to value its hermeticity, oxidation resistance, thermal cycling stability. SEM micrograph show that AI2TiO5 particles are well-distributed within the braze, improving its hermetical and mechanical properties. The particle was promoted CuO migration towards surfaces. The oxidation resistance of the braze by using more AI2TiO5 and less CuO was improved. Leakage rate was below 0.001 mL/（min ocm）. Open circuit voltage（OCV）saw no decrease after 100 h aging or 8 thermal cycles （400 - 800 ℃）. The results demonstrate that Ag-8 CuO-2 Al2TiO5 is an effective sealant for planer solid oxide fuel cell（pSOFC）components.

关 键 词：复合钎焊 固体氧化物燃料电池 Ag-CuO 低膨胀 

分 类 号：TM911.4[电气工程—电力电子与电力传动]