The CO2 absorption of several ABO3 type perovskites was studied by positron lifetime spectroscopy. The longer positron lifetime was associated with positrons trapped by A site vacancies. The evaluated positron lifetime data indicated the relative stability of the crystal structure of Sr(Co0.5Fe0.5)O(3-δ) against Ca doping at low Ca concentrations. Oxygen desorption and CO2 absorption/desorption could also be followed by positron lifetime spectroscopy. It was shown that the concentration of oxygen vacancies has a large effect on positron lifetime data through the electron density of A site vacancies. Copyright (C) 2000 Elsevier Science Ltd.
|Number of pages||4|
|Journal||Radiation Physics and Chemistry|
|Publication status||Published - Jun 1 2000|
|Event||6th International Workshop on Positron and Positronium Chemistry (PPC-6) - Tsukuba, Jpn|
Duration: Jun 7 1999 → Jun 11 1999
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