MANUFACTURING METHOD OF SINTERED MAGNET AND SINTERED MAGNET

• Main Authors: KWON SOON JAE, CHOI IK JIN, UH HYOUNSOO, KIM IN GYU
• Format: Patent
• Language: English; Korean
• Published: 19.03.2020
• Subjects: ADHESIVES; ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CHEMISTRY; DYES; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; MAGNETS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; POWDER METALLURGY; PREPARATION OF CARBON BLACK; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; WORKING METALLIC POWDER

Embodiments of the present invention are to provide a manufacturing method of a sintered magnet having a high coercive force by suppressing grain growth during a sintering process, and the sintered magnet manufactured by the method. The method for manufacturing a sintered magnet according to one embodiment of the present invention includes the following steps of: manufacturing an organic fluoride-coated additive on the rare earth hydride surface; and mixing the additive with magnetic powder and heating the same. The magnetic powder includes rare earth-iron-boron-based powder. 본 발명의 일 실시예에 따른 소결 자석의 제조 방법은 희토류 수소화물 표면에 유기 불화물이 코팅된 첨가제를 제조하는 단계; 및 상기 첨가제를 자석 분말과 혼합하여 가열하는 단계를 포함하고, 상기 자석 분말은 희토류-철-붕소계 분말을 포함한다.