MAGNETIC CORE AND COIL COMPONENT

• Main Author: TOKORO SEIGO
• Format: Patent
• Language: English; Japanese
• Published: 07.10.2021
• 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 magnetic core and a coil component with reduced eddy current loss and core loss.SOLUTION: In a coil component, a soft magnetic powder 6a contained in a magnetic core includes a pore particle 6a1 having a pore 6b inside and a non-pore particle 6a2 having no pore inside. The average particle size of the pore particle 6a1 is 5.0 μm or more and 50 μm or less, the number ratio of the particle having porosity of 1% or more is 1.0% or more and 5.0% or less, and the number ratio of particles having circularity of less than 0.50 in the cross section is 0.05% or more and 2.00% or less.SELECTED DRAWING: Figure 2 【課題】渦電流損失およびコアロスを低減した磁気コアおよびコイル部品を提供する。【解決手段】コイル部品において、磁気コアに含まれる軟磁性粉末６ａは、内部に気孔６ｂを有する気孔粒子６ａ１と、内部に気孔を有しない非気孔粒子６ａ２と、を含む。気孔粒子６ａ１の平均粒径が５．０μｍ以上５０μｍ以下であり、気孔率が１％以上である粒子の個数割合が１．０％以上５．０％以下であり、断面において円形度が０．５０未満である粒子の個数割合が０．０５％以上２．００％以下である。【選択図】図２