Back to results
US 7,381,483 B2Granted
Core having magnetic properties
AssigneeThe Hong Kong Polytechnic University
InventorsKa Wai Eric Cheng, Chak Yin Tang, David Ki Wai Cheng, Hang Wu
Life of this patent
Estimating the term…
Abstract
A magnetic core is made of a composite magnetic material having a relative permeability of between 1 and 29 at a frequency range from 20 kHz to 2.5 MHz. The composite magnetic material consists of cobalt and nickel particles having an average diameter in the range of 1 to 100 micrometers, and a polymer base binding the particles to form a core.
Claims7
A core made of a composite magnetic material having a relative permeability in a range from 1 to 29 in a frequency range from 20 kHz to 2.5 MHz, wherein the composite magnetic material comprises:
- a mixture of cobalt and nickel particles having an average diameter in a range from 1 to 100 micrometers, and
- a polymer base binding the mixture of particles and defining the shape of the core, the polymer base comprising an epoxy resin consisting of 4,4′ isopropylidenediphend epichlorohydrin resin, alkyl glycidyl ether and poly-acrylate ether, and a hardener consisting of diethylenetriamine and 2-hydroxyethydiethylenetriamine.
Dependencies are inferred from the claim text.