Materials Reports  2020, Vol. 34 Issue (Z2): 164-167 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Research on the Preparation of Layered Scandium Oxide by Hydroxide Precipitation |
| FU Guoyan, WANG Weiwei, LIU Zhaobo, LYU Dong, YAO Xin
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| China ENFI Engineering Technology Co., Ltd, Beijing 100038, China |
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Abstract The scandium oxide with layered structure prepared by hydroxide precipitation and roasting was studied in this paper. The effects of reaction temperature, precipitation, stirring rate and aging time on the recovery efficiency of scandium precipitation were studied. It was concluded that the main crystal phase of scandium sediment was ScOOH by XRD and FTIR analysis. Based on the scandium ion content value in scandium sediment, which was measured by inductively coupled plasma spectrometer (ICP-OES). The recovery percentages of scandium in the precipitation reaction were calculated. The results indicated that the recovery percentage of scandium precipitation was up to 97%, when the sodium hydroxide precipitant dosage, reaction temperature, stirring rate and aging time were 27.5 g/L, 60 ℃, 200 r/min and 2 h, respectively. The scan-dium oxide powder was obtained by roasting scandium hydroxide. The scandium oxide powder material was characterized by XRD, SEM-EDS, and FTIR. The scandium oxide had good crystal structure and was relatively pure, which consisted of scandium and oxygen elements. Meanwhile, according to the test of microstructure, the scandium oxide powder material was a layer structure of micron scale and the particles less than 20 μm.
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Published: 08 January 2021
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| Fund:This work was suppotted by the National Key Reserch and Development Project (2019YFC1907402). |
| About author:: Guoyan Fu received her PhD. degree in environmental engineering from Institute of Process Engineering, Chinese Academy of Sciences in 2018. In the same year, she joined China Enfi Engineering Technology Co., LTD and participates in the preparation of rare metal materials and powder materials. Her research interests are focusing on the preparation, characterization and morphology controll ability of rare metal powder mate-rials. She has published more than 10 articles in important journal and applied for more than 10 invention patents.Weiwei Wang is currently a professor lever senior engineer in China Enfi Engineering Corporation. She received her Ph.D. degree in inorganic chemistry from State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. She was as the postdoctoral fellow in 2008—2011 at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia. Then she joined the China Enfi Engineering Technology Co., LTD in June of 2008. She mainly engaged in rare earth smelting and scandium-based new materials preparation technology research. She has published more than 30 articles in the important journals at home and abroad. Meanwhile, she has obtained more than 10 authorized invention patents at home and abroad. |
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