RARE EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING RARE EARTH PERMANENT MAGNET

摘要

Provided are a rare earth permanent magnet and a method for manufacturing the rare earth permanent magnet, whereby the thickness precision of a green sheet is improved, enabling productivity to be improved. A magnetic material is pulverized into a magnetic powder, and the pulverized magnetic powder is mixed with a binder to produce a mixture containing a binder of 1 wt% to 40 wt%. A sheet-like green sheet having a precise thickness within ±5% of a set value is then manufactured by coating a substrate in a highly precise manner with the mixture that was produced. Next, the manufactured green sheet is maintained at a binder-decomposing temperature for a fixed time in a non-oxidizing atmosphere, causing the binder to decompose into monomers due to a depolymerization reaction, or the like, and scatter, thereby removing the binder. A permanent magnet (1) is then manufactured by sintering the green sheet, from which the binder has been removed, by means of a pressure sintering technique such as spark plasma sintering.