SOFT MAGNETIC POWDER MATERIAL AND POWDER MAGNETIC CORE USING THE SAME

• Main Authors: KITAMURA AKIRA, AKAIWA KOTA, OSHIMA YASUO
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2023
• 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 soft magnetic powder which can remove more distortions of pressure bonding by heat treating a compact at high temperatures, and can reduce hysteresis loss caused by the distortions, and a powder magnetic core using the same.SOLUTION: There is provided a soft magnetic powder material in which a mixture of a binder resin and a non-silicone-based compound is bonded to the surface of soft magnetic powder. The non-silicone-based compound contains at least one of an imide-based compound and a phenylene ether-based compound, an amount of the binder resin with respect to 100% of the mixture is 5 wt.% or more and 95 wt.% or less, an amount of the non-silicone-based compound with respect to 100% of the mixture is 5 wt.% or more and 95 wt.% or less, and 0.06 wt.% or more of the mixture is added to the soft magnetic powder. The non-silicone-based compound is preferably one or more selected from polyphenylene ether and 4,4'-bismaleimide diphenylmethane.SELECTED DRAWING: None 【課題】高い温度で成形体の熱処理を行うことで、加圧成形の歪をより多く除去することができ、歪が起因で発生するヒステリシス損失の低減を可能とした軟磁性粉末材とそれを用いた圧粉磁心を提供する。【解決手段】軟磁性粉末材では、軟磁性粉末の表面に結着性樹脂と非シリコーン系化合物の混合物が付着している。非シリコーン系化合物は、イミド系化合物、フェニレンエーテル系化合物の少なくとも１つを含み、前記混合物１００％に対する前記結着性樹脂の量が９５ｗｔ％以下５ｗｔ％以上であり、前記混合物１００％に対する前記非シリコーン化合物の量が５ｗｔ％以上９５ｗｔ％以下で混合され、前記軟磁性粉末に対して、前記混合物が０．０６ｗｔ％以上添加されている。非シリコーン系化合物が、ポリフェニレンエーテル、４，４'－ビスマレイミドジフェニルメタンから選択された１つまたは複数であることが好ましい。【選択図】なし