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Synchrotron XRD and EXAFS studies on nanocrystalline ZrO 2-CaO solid solutions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Yonemura, Masao Koga, Hikaru Pitteloud, Cédric Iyama, Hiromasa Matsuda, Yasuaki Mori, Daisuke Nagao, Miki Yamada, Atsuo Kanzaki, Sho Fleramosca, Joe Kiyanagi, Ryoji Itoh, Keiji Kanno, Ryoji |
| Copyright Year | 2008 |
| Abstract | Lanthanum strontium cobaltites, La0.4Ba0.6CoO3-x, which have a perovskite-type structure, are promising electrode materials for solid oxide fuel cells (SOFCs). The purpose of the present study is to investigate the crystal structure of the cubic Pm-3m perovskitetype La0.4Ba0.6CoO3-x at room temperature and at high temperature by neutron diffractometry. Neutron diffraction data were collected in air by a diffractometer HERMES with a 150 multi-detector system. A furnace with MoSi2 heaters was placed on the sample table, and used for neutron diffraction measurements at high temperatures (J. Am. Ceram. Soc. 85 (2002) 2925). The experimental data were analyzed assuming the cubic perovskite-type structure by Rietveld method. La and Ba atoms were placed at the special position 1b 1/2, 1/2, 1/2 of the Pm-3m symmetry. Co and O atoms were put at the 1a 0, 0, 0 and 3d 1/2, 0, 0 sites, respectively. The calculated profile agreed well with the observed one taken at room temperature (Figure). The refined crystal s t r u c t u r e o f La0.4Ba0.6CoO3-x is similar with t h a t o f c u b i c La0.6Sr0.4CoO3-x at 1531K reported in our previous work [J. Appl. Crystallogr., 40 (2007) 1166]. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://journals.iucr.org/a/issues/2008/a1/00/a39912/a39912.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
