Effect of Annealing Atmosphere on Oxygen Diffusion through Ba-Fe-Based Perovskite Oxide
Effect of Annealing Atmosphere on Oxygen Diffusion through Ba-Fe-Based Perovskite Oxide
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DOI：
10.4028/www.scientific.net/kem.485.141
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Ken Watanabe;T. Kida;I. Sakaguchi;N. Ohashi;K. Shimanoe;H. Haneda
中科院分区：
文献类型：
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作者：
Ken Watanabe;T. Kida;I. Sakaguchi;N. Ohashi;K. Shimanoe;H. Haneda
为了确定退火气氛对Ba0.95La0.05FeO3-d球团中氧扩散的影响，进行了18O2示踪剂扩散和高分辨率二次离子作图。在空气中退火时，表面周围40µm深度的18O浓度几乎不变。另一方面，真空退火时，18O浓度明显降低。高分辨率二次离子作图表明，晶界附近的18O浓度降低。这些结果表明，真空退火的BLF晶界阻止了氧的扩散。
To determine the effect of the annealing atmosphere on oxygen diffusion through Ba0.95La0.05FeO3-d pellets, 18O2 tracer diffusion and high-resolution secondary ion mapping were performed. When annealing in air, the 18O concentration around the surface up to a depth of 40 µm was almost constant. On the other hand, when annealing in vacuum, the 18O concentration obviously decreased. High-resolution secondary ion mapping indicated that the 18O concentration around the grain boundary was reduced. These results suggested that the grain boundary of BLF annealed in vacuum prevents oxygen diffusion.