Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions
Nd1.85Ce0.15CuO4−δ powders are chemically reduced in supercritical sodium ammonia solutions from room temperature to 350°C. The crystallographic structure of the reduced powders is investigated from Rietveld refinement of X-ray powder diffraction. The atomic positions are maintained constant within...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/873972 |
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| author | Yasmin Dias Hui Wang Haiqing Zhou Feng Lin Yucheng Lan |
| author_facet | Yasmin Dias Hui Wang Haiqing Zhou Feng Lin Yucheng Lan |
| author_sort | Yasmin Dias |
| collection | DOAJ |
| description | Nd1.85Ce0.15CuO4−δ powders are chemically reduced in supercritical sodium ammonia solutions from room temperature to 350°C. The crystallographic structure of the reduced powders is investigated from Rietveld refinement of X-ray powder diffraction. The atomic positions are maintained constant within experimental errors while temperature factors of all atoms increase significantly after the chemical treatments, especially of Nd/Ce atoms. The ammonothermally reduced Nd1.85Ce0.15CuO4−δ powders show diamagnetic below 24 K which is contributed to the lower oxygen content and higher temperature factors of atoms in the treated compound. The ammonothermal method paves a new way to reduce oxides in supercritical solutions near room temperature. |
| format | Article |
| id | doaj-art-59d6da02f468423aa7359fd39c3e6de8 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-59d6da02f468423aa7359fd39c3e6de82025-08-20T03:34:37ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242015-01-01201510.1155/2015/873972873972Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia SolutionsYasmin Dias0Hui Wang1Haiqing Zhou2Feng Lin3Yucheng Lan4Department of Physics and Engineering Physics, Morgan State University, Baltimore, MD 21251, USADepartment of Physics, University of Houston, Houston, TX 77204, USADepartment of Physics, University of Houston, Houston, TX 77204, USAState Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Physics and Engineering Physics, Morgan State University, Baltimore, MD 21251, USANd1.85Ce0.15CuO4−δ powders are chemically reduced in supercritical sodium ammonia solutions from room temperature to 350°C. The crystallographic structure of the reduced powders is investigated from Rietveld refinement of X-ray powder diffraction. The atomic positions are maintained constant within experimental errors while temperature factors of all atoms increase significantly after the chemical treatments, especially of Nd/Ce atoms. The ammonothermally reduced Nd1.85Ce0.15CuO4−δ powders show diamagnetic below 24 K which is contributed to the lower oxygen content and higher temperature factors of atoms in the treated compound. The ammonothermal method paves a new way to reduce oxides in supercritical solutions near room temperature.http://dx.doi.org/10.1155/2015/873972 |
| spellingShingle | Yasmin Dias Hui Wang Haiqing Zhou Feng Lin Yucheng Lan Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions Advances in Condensed Matter Physics |
| title | Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions |
| title_full | Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions |
| title_fullStr | Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions |
| title_full_unstemmed | Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions |
| title_short | Chemical Reduction of Nd1.85Ce0.15CuO4−δ Powders in Supercritical Sodium Ammonia Solutions |
| title_sort | chemical reduction of nd1 85ce0 15cuo4 δ powders in supercritical sodium ammonia solutions |
| url | http://dx.doi.org/10.1155/2015/873972 |
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