Evidence for oxygen vacancies in misfit-layered calcium cobalt oxide, [CoCa2O3]qCoO2

被引：115
作者：
Karppinen, M [1 ]
Fjellvåg, H
Konno, T
Morita, Y
Motohashi, T
Yamauchi, H
机构：
[1] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
[2] Univ Oslo, Dept Chem, N-0315 Oslo, Norway
来源：
CHEMISTRY OF MATERIALS | 2004年 / 16卷 / 14期
关键词：
D O I：
10.1021/cm049493n
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have synthesized samples of the misfit-layered [CoCa2O3](q)CoO2 compound with three different oxygen contents and characterized them by both wet-chemical and thermogravimetric analyses for the determination of precise oxygen content, and by synchrotron X-ray diffraction for the precise determination of the magnitude of q. Combining the results from the structural and oxygen-content analyses it is concluded that for samples synthesized in air or a more reducing atmosphere there occur considerable amounts of oxygen vacancies in at least one of the three types of layers, COO, CaO, and CoO2. Bulk character of the oxygen vacancies was confirmed from transport-property measurements.
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页码：2790 / 2793
页数：4
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