Research Progress in Preparation and Purification of Rare Earth Metals
The purity of rare earth metals is one of the most important factors to research and develop high technique materials. However, high purity rare earth metals are not easily achieved. This review summarizes the preparation and purification methods of rare earth metals. First, the preparation principl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/10/1376 |
| _version_ | 1827704190964596736 |
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| author | Hang Liu Yao Zhang Yikun Luan Huimin Yu Dianzhong Li |
| author_facet | Hang Liu Yao Zhang Yikun Luan Huimin Yu Dianzhong Li |
| author_sort | Hang Liu |
| collection | DOAJ |
| description | The purity of rare earth metals is one of the most important factors to research and develop high technique materials. However, high purity rare earth metals are not easily achieved. This review summarizes the preparation and purification methods of rare earth metals. First, the preparation principle and process of molten salt electrolysis and metal thermal reduction are introduced. The main sources of metallic impurities and interstitial impurities in rare earth metals as well as the action mechanism of reducing the concentration of different impurities are analyzed and summarized. Then, the purification principle and process of vacuum distillation, arc melting, zone melting, and solid state electromigration are also discussed. Furthermore, the removal effect and function rule of metallic impurities and interstitial impurities in rare earth metals are outlined. Finally, the crucial issues in the development of high purity rare earth metals are put forward, and the development direction of high purity rare earth metals in future are pointed out on this basis. |
| first_indexed | 2024-03-10T15:35:15Z |
| format | Article |
| id | doaj.art-25e1ad820c004f65abb95f156d1406b5 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T15:35:15Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-25e1ad820c004f65abb95f156d1406b52023-11-20T17:16:02ZengMDPI AGMetals2075-47012020-10-011010137610.3390/met10101376Research Progress in Preparation and Purification of Rare Earth MetalsHang Liu0Yao Zhang1Yikun Luan2Huimin Yu3Dianzhong Li4Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaBaotou Rare Earth R&D Center, Chinese Academy of Sciences, Baotou 014000, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaThe purity of rare earth metals is one of the most important factors to research and develop high technique materials. However, high purity rare earth metals are not easily achieved. This review summarizes the preparation and purification methods of rare earth metals. First, the preparation principle and process of molten salt electrolysis and metal thermal reduction are introduced. The main sources of metallic impurities and interstitial impurities in rare earth metals as well as the action mechanism of reducing the concentration of different impurities are analyzed and summarized. Then, the purification principle and process of vacuum distillation, arc melting, zone melting, and solid state electromigration are also discussed. Furthermore, the removal effect and function rule of metallic impurities and interstitial impurities in rare earth metals are outlined. Finally, the crucial issues in the development of high purity rare earth metals are put forward, and the development direction of high purity rare earth metals in future are pointed out on this basis.https://www.mdpi.com/2075-4701/10/10/1376rare earth metalspurityimpurity concentrationpreparationpurification |
| spellingShingle | Hang Liu Yao Zhang Yikun Luan Huimin Yu Dianzhong Li Research Progress in Preparation and Purification of Rare Earth Metals Metals rare earth metals purity impurity concentration preparation purification |
| title | Research Progress in Preparation and Purification of Rare Earth Metals |
| title_full | Research Progress in Preparation and Purification of Rare Earth Metals |
| title_fullStr | Research Progress in Preparation and Purification of Rare Earth Metals |
| title_full_unstemmed | Research Progress in Preparation and Purification of Rare Earth Metals |
| title_short | Research Progress in Preparation and Purification of Rare Earth Metals |
| title_sort | research progress in preparation and purification of rare earth metals |
| topic | rare earth metals purity impurity concentration preparation purification |
| url | https://www.mdpi.com/2075-4701/10/10/1376 |
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