| 摘要 |
PROBLEM TO BE SOLVED: To provide iron nitride powder mainly comprising iron nitride: α"-FeNexcellent in magnetic characteristics and a production method by which the iron nitride powder can be produced with high productivity.SOLUTION: Iron powder is dissolved in a carboxylic acid solution to prepare a gel while a magnetic field is applied, and the gel is dried to produce an iron complex from the gel. An organic component of the iron complex is removed to produce iron oxide. Further, by performing reduction/nitridation to the iron oxide to produce iron nitride: α"-FeN, iron nitride powder comprising an iron nitride particle can be obtained. Since iron powder of micron order can be utilized for a raw material, deterioration is hardly caused with time, handleability of raw material powder is excellent, and iron nitride can be stably produced with excellent productivity. The obtained iron nitride particle is fine, has a large aspect ratio, and excellent in magnetic characteristics due to shape magnetic anisotropy. |
