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

Abstract:

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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:

Edited by:

Chazono Hirokazu, Fujihara Shinobu, Katayama Keiichi, Masumoto Hiroshi, Mizoguchi Teruyasu, Osada Minoru, Shinozaki Kazuo and Takeda Hiroaki

Pages:

141-144

DOI:

10.4028/www.scientific.net/KEM.485.141

Citation:

K. Watanabe et al., "Effect of Annealing Atmosphere on Oxygen Diffusion through Ba-Fe-Based Perovskite Oxide", Key Engineering Materials, Vol. 485, pp. 141-144, 2011

Online since:

July 2011

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$35.00

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