| 摘要 |
<p>A main body of a magnetic core is obtained by winding an iron based amorphous ribbon or laminating the ribbons. This main body of the magnetic core is heat-treated in a wet atmosphere including a limited quantity of water vapour. Thereby, the magnetic core, which has a little iron loss and has a stable characteristic in the region of a low permeability, is obtained with a high yield. Also, in the case of heat treatment of such a magnetic core, adopted is a method, in which the temperature of the heat treatment is compared with the Curie temperature, the differential crystallization temperature or the crystallization peak temperature of the amorphous ribbon sampled arbitrarily, and its optimum value is determined. Thereby, even when in the magnetic ribbon of the material, there are some variations, the magnetic core stabilized in product characteristics can be obtained constantly with a high yield.</p> |
