Effects of La2O3, Nd2O3, NiO and CoO additions on the characteristics of SiO2–Al2O3–Y2O3–ZnO glass seals for intermediate temperature solid oxide fuel cells

摘要: Abstract In this study, nine SiO 2 –Al O 3 –Y –ZnO glasses were prepared to evaluate their applications in intermediate temperature solid oxide fuel cells (IT-SOFCs). La , Nd NiO and CoO added the glass samples enlarge CTE improve adhesion on SUS430 stainless steel. It was found that YASZ-4 best candidate as a sealant among evaluated. The transition points, softening points crystallization peak of determined be 748 °C, 897 °C 969 °C, respectively, while coefficient thermal expansion (CTE) electrical resistivity at 700 °C reported 8.4 × 10 −6  K −1 4.43 × 10 8  Ω-cm, respectively. Partial substitution Y with observed increase its enhance SUS430. A strict more sensitive test condition employed study leak rate, which included helium gas pressure 1 psi across seals small top-loading 1.0 applied glass. rate for first three cycles stabilized 0.019 sccm/cm then, slightly decreased 0.012 sccm/cm after subsequent 500 h soaking, indicating trivial degradation sealing efficiency against long periods operation. XRD pattern leakage revealed fully amorphous nature retained. addition 30 mol% LaCoO further attempted value; however, results did not show an improvement terms low rate.