| 希土永磁材料Nd-Fe-B氧化过程及抗氧化新体系的研究 |
| OXIDATION OF PERMANENT MAGNET Nd-Fe-B AND THE RESEARCH OF NEW SYSTEM FOR OXIDATION-RESISTANCE |
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| 摘要: Nd-Fe-B永磁体的热稳定性较差,易氧化,氧化使材料的结构受到破坏,永磁性能受到不可恢复的损失。氧化过程是分阶段的,在室温和干燥的空气中是稳定的,150℃左右受到破坏的主要原因是体系中钕的氧化,230℃以上铁开始氧化,温度升高使氧化加快,800℃左右氧化基本结束,最终产物主要是Fe2O3、Nd2O3和NdBO3。新研制的Nd-Fe-B-Si四元体系的抗氧化能力有较大的提高,居里温度也提高了许多,是一种大有发展前途的新材料。 |
| 关键词: 希土永磁材料 Nd-Fe-B 氧化 |
| 基金项目: |
| Abstract: The thermo-stability of permanent magnet Nd-Fe-B is poor. It can be oxidized easily. Oxidation can destroy the structure of the material and deteriorate the performance of permanent magnet. The process of oxidation consists of several stages. The material is stable at room temperature and in dry air. Around 150℃,the main reason of deterioration is tne oxidation of the neodymium. The oxidation of iron, which is the main component of the magnet, begins around 230℃. With the rise in temperature, the reaction will be quickened and proceed to the end around 800℃. The main final products are Fe2O3, Nd2O3, NdFeO3 and NdBO3. The oxidation-resistance of the new system Nd-Fe-B-Si is greatly improved and its Curie temperature is higher than that of Nd-Fe-B. So, it is a new material with bright future. |
| Keywords: rare earth permament magnet Nd-Fe-B oxidation |
| 投稿时间：1988-02-09 |
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| 苏锵,李东来,杨健美,宋连仁,王鸿燕.希土永磁材料Nd-Fe-B氧化过程及抗氧化新体系的研究[J].无机化学学报,1990,6(3):283-286. |
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