Composite for composite rare earth bonded magnet and preparation method thereof

• Main Authors: CHEN ZHONGMIN, CHEN ZUOYAN, HAN ZHISAN
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CASTING; ELECTRICITY; INDUCTANCES; MAGNETS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; WORKING METALLIC POWDER

The present disclosure relates to a method of preparing a composite for a composite rare earth bonded magnet, the method comprising preparing a mixture of RE-Fe-M-B and Sm-Fe-N magnetic powders, a surfactant and a binder, mixing the mixture with a stearate (ester) and a dispersant, and evaporating the dispersant, thereby obtaining the composite for a composite rare earth bonded magnet, wherein RE is one or more rare earth metals, Fe is iron, M is absent or one or more metals, B is boron, Sm is samarium, and N is nitrogen. The present disclosure also relates to a composite rare earth bonded magnet comprising an RE-Fe-M-B magnetic powder, an Sm-Fe-N magnetic powder, a stearate (ester), and a binder. 本公开涉及一种制备用于复合稀土粘结磁体的复合物的方法，该方法包括制备RE-Fe-M-B和Sm-Fe-N磁性粉末、表面活性剂和粘合剂的混合物，将该混合物与硬脂酸盐(酯)和分散剂混合，以及蒸发分散剂，从而获得用于复合稀土粘结磁体的复合物，其中RE是一种或更多种稀土金属，Fe是铁，M不存在或是一种或更多种金属，B是硼，Sm是钐，并且N是氮。本公开还涉及一种包含RE-Fe-M-B磁性粉末、Sm-Fe-N磁性粉末、硬脂酸盐(酯)和粘合剂的复合稀土粘结磁体。