|
|||||
|
|
CO2 absorption of perovskites as seen by positron lifetime spectroscopy |
|
| Authors: | K Süvegh K Nomura G Juhsz Z Homonnay A Vrtes |
| Institution: | a Department of Nuclear Chemistry, Eötvös Loránd University, H-1518 Budapest 112, P.O. Box 32, Hungary b Graduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan |
| Abstract: | 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)O3?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. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |