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Rare-earth permanent magnets (e.g., Sm-Co, Nd-Fe-B, Sm-Fe-N) are core components of high-performance magnetic materials, widely used in new energy, electronic information, and national defense. Compared with physical methods, chemical preparation techniques for rare-earth permanent magnets exhibit unique advantages such as atomic-level mixing, morphology controllability, and low-temperature synthesis, and are gradually becoming research hotspots. This review systematically summarized the research progress of chemical preparation technologies including the sol-gel method, hydrothermal method, co-precipitation method, thermal decomposition method, and emerging synthetic approaches. It analyzed the microstructure regulation mechanisms and magnetic performance optimization strategies, followed by discussion of current challenges and future development directions in this field.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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