粘结NdFeB磁体的制备工艺

Preparation technology of the bonded NdFeB magnet

摘要: 利用NdFeB 磁粉、聚酰亚胺制备了粘结NdFeB 磁体。研究了磁粉粒度、偶联剂用量、粘结剂用量、成型压力和粘结剂性能对粘结磁体磁性能及力学性能的影响。实验结果表明,合理的粒度配比(粗∶细为33∶67) 、偶联剂用量(磁粉0. 9 %) 、粘结剂用量(磁粉3. 2 %) 、合适的压力(600 MPa) 以及以聚酰亚胺作为粘结剂,可以获得具有较好磁性能和力学性能的粘结NdFeB 磁体。

Abstract: The bonded NdFeB magnet was prepared with NdFeB magnetic powders and polyimide. The effect s ofparticle size of magnetic powders , coupling agent content , adhesive content , molding pressure and adhesive propertyon the magnetic and mechanical properties of bonded magnet s were studied. The results indicate that the bondedNdFeB magnets with good properties can be obtained by a proper ratio of big particles to small particles , appropriateamount of coupling agent and adhesive , proper pressure and polyimide. The ratio of the coarse particles to the fineones was 33 to 67. The content s of coupling agent and adhesive were 0. 9 % and 3. 2 % , respectively. The properpressure was 600 MPa.