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Effect of Annealing Atmosphere on Oxygen Diffusion through Ba-Fe-Based Perovskite Oxide

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Abstract:

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.

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Periodical:

Key Engineering Materials (Volume 485)

Pages:

141-144

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.485.141

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Online since:

July 2011

Authors:

Ken Watanabe, Tetsuya Kida, Isao Sakaguchi, Naoki Ohashi, Kengo Shimanoe, Hajime Haneda

Keywords:

Oxygen-Permeable Membrane, Perovskite, Secondary Ion Mass Spectroscopy (SIMS), Tracer Diffusion

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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