United States Patent Number 5,543,174
August 6,1996
Reference*
Thermoplastic coated magnetic powder compositions and methods of making same
Patent Abstract
An iron powder composition comprising an iron powder coated with a substantially
uniform coating of a thermoplastic material and admixed with a boron nitride
powder and a method of utilizing the mixture to produce a magnetic core component
is provided. The iron powder mixture is formulated with up to about 1% by
weight of boron nitride which reduces the stripping and sliding die ejection
pressures during high temperature molding and also improves the permeability
of the magnetic part over an extended frequency range.
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