Thomson-csf

Claude Rohart

Richard Lebourgeois

Jean-Pierre Delvinquier

Michel Pate

Adele Le Fur

Francedillaois Beauclair

A composite magnetic material showing reduced losses and reduced permeability when it is subjected to a magnetic field at frequencies below approximately 100 MHz. It comprises magnetic particles in the form of wafers dispersed in a dielectric binder. The polycrystalline magnetic ceramic wafers are oriented so that their main faces are substantially parallel to the magnetic field. Application especially to cores of inductors or transformers.

Composite magnetic material with reduced permeability and losses

Disclosed is a ferrite material having low magnetic losses at frequencies of about 1 megahertz to 100 megahertz, and having firing and sintering temperatures lower than about 1000.degree. C. The material is a nickel-zinc-copper material with cobalt substitution, particularly well suited to the making of magnetic cores and more specifically to the making of micro-inductors.

Low-loss ferrite working between 1 MHZ and 100 MHZ and method of

A magnetic core includes a body made of polycrystalline ceramic and at least one localized gap made of a composite magnetic material. The gap may be preferably fixedly joined to the body by bonding or molding. The magnetic core has applications in inductors or transformers. The inductor preferably has a coil located on the body, which coil is preferably made of multistranded enameled wires.

Growing community of inventors

Palaiseau, France

Claude Rohart