Iron Powder Cores
Iron powder cores are made from finely defined particles of iron. The particles are insulated from each other but bound together with binding compound. The mixture is pressed to the finished shape under heavy pressure and a system of distributed air gap is thereby created. The finished iron powder core has a maximum permeability of about 110, which is lower than the raw material used, iron. A compressed iron powder cores are made of a compressed body of a magnetic powder each particle of which has a surface covered with an insulating layer. The insulating layer is formed of an insulating material selected from the group consisting of an inorganic compound powder having an electro negativity of not less than 12.5, and the inorganic compound powder having an electro negativity of less than 8.5, a metal alkoxide and a decomposition product of a metal alkoxide.
B-H CURVES OF THE IRON POWDER CORES
EFFECTIVE PERMEABILITY VS FREQUENCY OF THE IRON POWDER CORE
