A method of coating a layer of cobalt ferrite on the surface of ultrafine iron particles by soaking was studied,and the change of magnetic properties of was discussed.

• 研究了用浸渍方法在超微铁颗粒表面生成了一层钴铁氧体层，并对由此引起样品的比饱和磁化强度和矫顽力的改变进行探讨。