Characteristics of a SiO2–B2O3–Al2O3–BaCO3–PbO2–ZnO glass–ceramic sealant for SOFCs
作者： Ruifang Wang , Zhe Lü , Chaoqian Liu , Ruibin Zhu , Xiqiang Huang
DOI: 10.1016/J.JALLCOM.2006.05.105
关键词:
摘要: A glass system based on SiO2-B2O3-Al2O3-BaCO3-PbO2-ZnO was prepared and a sort of compounding optimized to determine the composition with best performance named AF8. The technical thermal expansion coefficient (t-TEC) is 10.58 x 10(-6) K-1 between 323 773 K. resistivity AF8 1.95 10(4) Omega cm at 800 degrees C. optimum sealing temperature range 850-880 sealant could adhere electrolyte yttria stabilized zirconia (YSZ) well there were no perforative pores in sealant. leak rate 0.81 10(-7) mbar 1 s(-1) cm(-1) C tested by oxygen coulometric titration which closed required value. Around temperature, contact angle YSZ about 110 degrees. This can make them under suitable pressure, also avoids spreading freely surface electrolyte. All measured results approved that may become practical for SOFCs. (c) 2006 Published Elsevier B.V.
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