Powder magnetic cores are made of discrete particles of ferromagnetic powder. Before forming the magnetic powder core, the particles are covered with a thin layer of electrically insulating material to ensure electrical isolation of each particle. The particles are then compacted under high pressure to form a magnetic powder core geometry. The electrical insulation between particles enables materials to be used at high frequencies. Insulation also forms distributed air gaps that penetrate the magnetic core material, enabling the material to maintain inductance linearity when biased by DC. Wanli New Material Alloy Magnetic Powder Core produces various materials: MNS iron silicon aluminum, MNF iron silicon, MNP iron nickel molybdenum, MNH iron nickel, DC bias optimized alloy MND, loss optimized alloy MNC. The following describes the size and magnetic permeability range of each material, as well as their characteristics and applications.