Modifying the oxygen adsorption properties of YBaCo(4)O(7) by Ca, Al, and Fe doping

作者：Wang Song; Hao Haoshan; Zhu Baofeng; Jia Jianfeng; Hu Xing^*

来源：Journal of Materials Science, 2008, 43(15): 5385-5389.

DOI：10.1007/s10853-008-2806-8

The doping effect of Ca, Al, and Fe on the oxygen adsorption properties of YBaCo(4)O(7) was investigated by thermogravimetry (TG) method. It was found that the original YBaCo(4)O(7) oxygen adsorption properties can be modified greatly by Ca, Al, and Fe doping. Ca doping in Y sites eliminates the oxygen adsorption at low temperature (similar to 300 degrees C) but the oxygen adsorption properties at high temperature is almost unchanged. Minor Al doping in Co sites eliminates the oxygen adsorption hump at high temperature, but the hump at low temperature is preserved. Fe appearance in YBaCo(3)Al(1-x) Fe (x) O(7) seems to weaken the effect of Al doping, so the oxygen hump at high temperature emerges again. The doping effect was discussed based on elements valence, binding energy between cations and oxygen ions, and distortion of crystal structure.

• 出版日期2008-8
• 单位河南工程学院; 郑州大学