Abstract: A ferrite sheet includes a ferrite sintered body capable of being in direct and sufficiently close contact with a signal cable and has good noise removal properties. The ferrite sheet includes a flexible sheet having a foldable portion, a plurality of ferrite sintered bodies located in a region other than the foldable portion on the flexible sheet, an elastic body arranged around the ferrite sintered bodies on the flexible sheet, and an adhesive layer arranged on the elastic body such that the elastic body is bonded to itself when the flexible sheet is bent along the foldable portion.

Abstract: A ferrite sheet includes a ferrite sintered body capable of being in direct and sufficiently close contact with a signal cable and has good noise removal properties. The ferrite sheet includes a flexible sheet having a foldable portion, a plurality of ferrite sintered bodies located in a region other than the foldable portion on the flexible sheet, an elastic body arranged around the ferrite sintered bodies on the flexible sheet, and an adhesive layer arranged on the elastic body such that the elastic body is bonded to itself when the flexible sheet is bent along the foldable portion.

Abstract: A method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of flattened-ring compact bodies made of a magnetic material, arranging the plurality of flattened-ring compact bodies adjacently so that the axes of flattened through-holes of the flattened-ring compact bodies are vertically oriented, and firing the flattened-ring compact bodies while the powder is interposed between the adjacent flattened-ring compact bodies. Alternatively, a method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of thin compact bodies made of a magnetic material, vertically arranging the plurality of thin compact bodies adjacently, and firing the thin compact bodies while the powder is interposed between the adjacent thin compact bodies.

Abstract: A method for easily sintering a magnetic core while preventing damage to the magnetic core caused by deformation or other problems, includes preparing a flattened tubular compact by forming the compact to have a flattened tubular shape and a through hole. A supporting plate made from a baked porcelain material or a metal material having a dimension that allows for insertion into the through hole of the flattened tubular compact, as well as a length that is sufficiently longer than that of the flattened tubular compact, is inserted through the through hole. The flattened tubular compact is placed inside of a sintering container having highly pure alumina powder spread therein so that the axial direction of the compact is horizontal. The flattened tubular compact is then sintered in a sintering furnace to produce the magnetic core.