Commercial
Electric Vehicles
其定义
Roughly 30% of a sintered NdFeB magnet's mass is rare earth. That single ratio is what connects a Chinese clay hill to a German traction motor.
材料清单
放大规模 →数量为 per kg of finished magnet参考区间
将这些数据理解为"大致如此，存在一定误差"。每家制造商的设计各有不同，且随着工程师逐步减少对高价物料的用量，数据会随时间下降。
| 材料 | 低 | 高 | 单位 | 基准 |
|---|---|---|---|---|
| Iron Ore | 0.6 | 0.7 | kg | Iron balance of the alloy |
| Neodymium 关键 Often supplied as mixed NdPr. | 0.2 | 0.3 | kg | Rare-earth content of the alloy |
| Praseodymium 关键 | 0.04 | 0.08 | kg | Part of the NdPr fraction |
| Dysprosium 关键 Grain-boundary diffusion cuts this sharply. | 痕量 | 0.06 | kg | Added for heat resistance |
| Terbium 关键 | 痕量 | 0.02 | kg | Added for the hottest grades |
| Boron 关键 | 0.008 | 0.012 | kg | About 1% by weight |
Indicative range compiled from published technology studies and chemistry; verify against a manufacturer specification before use. 标注为"微量"的行表示该物料含量极低，无法以质量形式有效表达——其制约因素在于纯度或供应商数量，而非吨位。
替代方案
替代是材料领域最被低估的力量。当某种金属价格高涨或在政治上难以获取时，工程师便会绕开它进行设计——整座矿山的需求可能因此消失殆尽。
