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Microstructure Effect on the Oxygen Permeation through Ba 0.95 La 0.05 FeO 3−δ Membranes Fabricated by Different Methods
Author(s) -
Watanabe Ken,
Ninomiya Subaru,
Yuasa Masayoshi,
Kida Tetsuya,
Yamazoe Noboru,
Haneda Hajime,
Shimanoe Kengo
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03700.x
Subject(s) - membrane , permeation , microstructure , malic acid , oxygen , grain size , amorphous solid , materials science , oxygen permeability , sintering , grain growth , permeability (electromagnetism) , chemical engineering , nuclear chemistry , analytical chemistry (journal) , chemistry , metallurgy , chromatography , crystallography , organic chemistry , biochemistry , engineering , citric acid
In order to investigate the effect of the microstructure on the oxygen permeation in Ba 0.95 La 0.05 FeO 3−δ membranes, three different methods such as solid‐state reaction, nitrate and acetate decomposition (NAD), and amorphous malic acid precursor (AMP) methods were used to fabricate membranes with different grain sizes. The grain size of the membranes was successfully controlled from 35 to 829 μm 2 via sintering at 1175°–1275°C. The oxygen permeation fluxes through the Ba 0.95 La 0.05 FeO 3−δ membranes increased with a decrease in the grain size. The AMP method, using malic acid as a complexing agent, produced a membrane having the highest oxygen permeability (3.10 cm 3 ·(min·cm 2 ) −1 at 930°C) and the smallest grain size. The results obtained again confirmed the significant importance of microstructure control in designing high‐performance oxygen permeable membranes.