POWDER-COMPRESSED MOLDED MAGNETIC BODY, MAGNETIC CORE, AND COIL TYPE ELECTRONIC COMPONENT

• Main Authors: SASAKI HIROKATSU, ITO MAMORU, KOMATSU HIDEKI, SHIBUYA YOSHITAKA, MURASE TAKU, KIMURA KAZUAKI, KOBAN TAMOTSU, NAKAMURA KAZUHIRO, MATSUI SHIGEKI
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; MAGNETS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a powder-compressed molded magnetic body which can be easily manufactured with excellent insulation characteristics while maintaining a stable quality, and has less deterioration of magnetic characteristics, a magnetic core made of the magnetic body, and a coil type electronic component having the magnetic core.SOLUTION: A powder-compressed molded magnetic body includes an alloy particle 2 constructed by Fe-Si-Cr-based soft magnetic alloy. In the powder-compressed molded magnetic body, phosphorus of 40 to 100 ppm is included. A Cr oxide film 4 including phosphorus is formed on a front surface of the alloy particle 2.SELECTED DRAWING: Figure 1 【課題】製造が容易で品質の安定化が図れ、しかも絶縁特性に優れ、磁気特性の劣化も少ない圧粉成形磁性体と、その磁性体から成る磁芯、その磁芯を有するコイル型電子部品を提供すること。【解決手段】Ｆｅ−Ｓｉ−Ｃｒ系軟磁性合金で構成される合金粒子２を含む圧粉成形磁性体である。リンが４０〜１００ｐｐｍ含まれ、合金粒子２の表面には、リンを含むＣｒ酸化膜４が形成してある。【選択図】図１