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US 6,033,782 AGranted
Low volume lightweight magnetodielectric materials
AssigneeGeneral Atomics
InventorsRonald N. Hubbard, Michael L. Duhl
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AssigneeGeneral Atomics
InventorsRonald N. Hubbard, Michael L. Duhl
Estimating the term…
A magnetodielectric composition is made of flakes of magnetic material dispersed in a binder at a concentration of about 30 to 60%. The flakes consist of a thin film of magnetic material or alternating thin film layers of magnetic material and insulating material. The flakes do not include a substrate. Consequently, the effective volume concentration of magnetic material in the composition is far greater than with other magnetodielectric materials. The binder is selected to provide a fluent composition for application like paint or a setable composition for formation of sheets and molded structural elements. In use, the composition is effective to reduce the size, weight and volume of electrical devices such as antennas, delay lines, phase shifters and other devices requiring interaction with and/or magnetic response to high frequency radiation.
A magnetodielectric composition comprising flakes of magnetic material dispersed in a binder,
A process for making compositions having magnetodielectric characteristics and comprised of low volume light weight thin film particles dispersed in a binder comprising the steps of providing a substrate, depositing on a surface of the substrate at least one thin film of magnetic material capable of providing magnetodielectric characteristics, separating the thin film of magnetic material from the substrate, dividing the thin film into performance size particles for use as particulates in magnetodielectric compositions, and dispersing the particles in a binder at a concentration of from about 30% to about 60% by volume.
Dependencies are inferred from the claim text.