Oxygen and cation ordered perovskite, Ba2Y2Mn4O11

Karppinen, Maarit; Okamoto, Hiroshi; Fjellvåg, Helmer; Motohashi, Teruki; Yamauchi, H.

doi:10.1016/j.jssc.2004.02.003

Cited by 39 publications

(38 citation statements)

References 24 publications

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“…Details in the solid-state reaction synthesis of BaYMn 2 O 5+¤ have been described elsewhere. 6), 9) Phase purity and lattice parameters were checked for the resultant products by means of X-ray powder diffraction (XRD; Rigaku Ultima IV; Cu K¡ radiation). The grain morphology was observed with a scanning electron microscope (SEM; JEOL JSM-6300F).…”

Section: Introductionmentioning

confidence: 99%

Enhanced oxygen intake/release kinetics of BaYMn2O5+.DELTA. fine powders prepared by a wet-chemical route

Motohashi

Ueda

Masubuchi

et al. 2011

J. Ceram. Soc. Japan

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The effect of grain size on the oxygen intake/release kinetics were investigated for double-perovskite type BaYMn 2 O 5+¤ (¤ = 0.0 1.0). The preparation of BaYMn 2 O 5+¤ with larger specific surface area was achieved by low-temperature firing (down to 900°C) of precursors obtained from a wet-chemical route. The oxygen intake/release rates at 500°C were found to increase significantly in the resultant BaYMn 2 O 5+¤ fine powders, indicating a key role of the powder surface in the oxygen intake/release processes.

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Section: Introductionmentioning

confidence: 99%

Enhanced oxygen intake/release kinetics of BaYMn2O5+.DELTA. fine powders prepared by a wet-chemical route

Motohashi

Ueda

Masubuchi

et al. 2011

J. Ceram. Soc. Japan

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“…The remarkable oxygen intake/release capability has been discovered and highlighted for a complex cobalt oxide, YBaCo 4 O 7+ (which is called "Y-114") [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The remarkable oxygen intake/release capability of Y-114 has made this compound a promising candidate for a new oxygen-storage material [1,2,5]. The highest oxygen content,   1.5, was achieved by means of high-pressure oxygen annealing [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, thermal stability, and oxygen intake/release characteristics of YBa(Co1−xAlx)4O7+δ

Komiyama

Motohashi

Masubuchi

et al. 2010

Materials Research Bulletin

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The YBaCo 4 O 7+ (Y-114) phase has recently attracted interests as a potential oxygen storage material due to its oxygen intake/release capability at 200 ~ 400C.Nevertheless, thermal instability of Y-114 has been an obstacle for future applications, since this compound immediately starts to decompose when the sample is heated at 700 ~ 800C in oxygen-rich atmosphere. Here we demonstrate that Al-for-Co substitution in Y-114 drastically enhances the thermal stability. Substituting only 10 at% of aluminum for cobalt in Y-114 essentially suppresses the decomposition reaction seen at 700 ~ 800C, while well retaining its remarkable oxygen intake/release capability at 200 ~ 400C. It is also revealed that the addition of aluminum effectively reduces the particle size. The Al-substituted Y-114 products exhibit superior oxygen intake/release response to the Al-free products upon switching the atmosphere between O 2 and N 2 .

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“…The ability of the layered YBaCo 4 O 7 + d oxide to reversibly absorb/desorb large amounts of oxygen at appreciably low temperatures has made it a highly promising candidate for a new oxygen storage material [1,2]. Through normal-pressure oxygen annealing it is possible to charge the phase with excess oxygen up to dE1.4 and then discharge it back to dE0.0 within a narrow temperature range of 200-400 1C.…”

Section: Introductionmentioning

confidence: 99%