Composite magnetic article for electromagnetic interference suppressor
AssigneeTokin Corporation
InventorsShigeyoshi Yoshida, Mitsuharu Sato, Eishu Sugawara, Yutaka Shimada
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Abstract
A composite magnetic article for use as an electromagnetic interference suppressing body, which comprises soft magnetic powder of at least one soft magnetic composition having a magnetostriction constant, each of particles of the powder being flaky, and organic binding agent binding said soft magnetic powder dispersed therein. The soft magnetic powder is as annealed after being worked flaky. The flaky particles of the soft magnetic powder have an average thickness less than a skin depth within which the skin effect occurs at a frequency band for which said composite magnetic article is used, each having an oxide outer layers.
Claims14
A composite article formed of soft magnetic powder in which particles thereof comprise at least one soft metal composition having a magnetostriction constant which is either positive or negative, said particles being in the form of flakes dispersed through an organic binder, said magnetic flakes having an average thickness of less than a skin depth within which a skin effect occurs at a frequency band at which said composite magnetic article is used.
A method for producing a composite magnetic article from a soft magnetic powder comprising at least one soft metal composition dispersed as particles through an organic binder, said method comprising:
- working particles of said soft magnetic powder and forming flakes thereof;
- annealing said flakes to remove residual strain produced during working;
- mixing said annealed flakes of soft magnetic powder with a liquid comprising said organic binding agent and a solvent to form a mixture thereof;
- and
- shaping said mixture into an article.
Dependencies are inferred from the claim text.