| 摘要 |
PURPOSE:To prevent or remarkably reduce the oxidation from the surface of magnet powder particle so as to improve the deterioration of magnetic characteristics by using moisture setting type resin for polymer resin. CONSTITUTION:R2T14B (R is rare earth element including Y, T is transition metal) rare earth magnetic powder is made by refusing an ingot which is obtained by fusion and jetting fused alloy against a rotating roll, etc., so as to ultraquench it. Hereby, a liquid quenched alloy thin belt and a thin piece are formed, which are made into powder as there are by rough pulverization, or this thin belt and thin piece are made into a compact by hot-pressing. And hot plastic working is applied and further by roughly pulverizing it powder is formed. Next, this magnetic powder is binded with moisture setting type resin, and magnetic shape is maintained. Hereby, the oxidizing reaction from the surface of magnetic powder can be reduced remarkably, and deteriorations on standing of magnetic characteristics, etc., can be improved remarkably. |
