SOFT MAGNETIC METAL POWDER, POWDER MAGNETIC CORE AND MAGNETIC COMPONENT

• Main Authors: HORINO KENJI, MATSUMOTO HIROYUKI, UJIIE TORU, MORI KENTARO, NAKANO TAKUMA, YOSHITOME KAZUHIRO, MORI SATOKO, OTSUKA SHOTA, TOKORO SEIGO
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• 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

To provide a powder magnetic core of good heat resistance, a magnetic component including the same and soft magnetic metal powder suitable for powder magnetic core.SOLUTION: In soft magnetic metal powder containing multiple soft magnetic metal particles, surface of the soft magnetic metal particle is covered with a coating part, the coating part has a first coating part, a second coating part, and a third coating part, in this order from the surface of the soft magnetic metal particle toward the outside, the first coating part contains an oxide of Si as main component, the second coating part contains an oxide of Fe as main component, and the third coating part contains one or more compounds selected from a group consisting of P, Si, Bi and Zn.SELECTED DRAWING: Figure 1 【課題】耐熱性が良好な圧粉磁心、これを備える磁性部品および当該圧粉磁心に好適な軟磁性金属粉末を提供すること。【解決手段】軟磁性金属粒子を複数含む軟磁性金属粉末であって、軟磁性金属粒子の表面は被覆部により覆われており、被覆部は、軟磁性金属粒子の表面から外側に向かって、第１の被覆部と、第２の被覆部と、第３の被覆部とをこの順に有し、第１の被覆部は、Ｓｉの酸化物を主成分として含み、第２の被覆部は、Ｆｅの酸化物を主成分として含み、第３の被覆部は、Ｐ、Ｓｉ、ＢｉおよびＺｎからなる群から選ばれる１つ以上の化合物を含むことを特徴とする軟磁性金属粉末である。【選択図】図１