AMORPHOUS MAGNETIC CORE, MAGNETIC DEVICE, AND METHOD FOR MANUFACTURING MAGNETIC CORE

摘要

PROBLEM TO BE SOLVED: To provide: a small, inexpensive magnetic core in a complicated shape by using amorphous magnetic powder having poor moldability; a method for manufacturing the magnetic core; and a magnetic device using the magnetic core.SOLUTION: An amorphous magnetic core consists of a thermally cured molding product of a magnetic material. The magnetic material is a mixture of magnetic powder and a thermosetting binding resin. The magnetic powder is amorphous metal powder coated with an inorganic insulative material. The thermosetting binding resin is an epoxy resin including a latent hardening agent. The content of the magnetic powder is 97 mass% or more and 98 mass% or less to a total amount of the magnetic powder and the thermosetting binding resin, and the content of the thermosetting binding resin is 2 mass% or more and 3 mass% or less. In the amorphous magnetic core, internal pores are filled with the epoxy resin. The amorphous magnetic core is 70 MPa or more in radial crushing strength.SELECTED DRAWING: Figure 1