Micro/nano Ni-Fe-P wave absorbing materials were prepared on the surface of Nocadia pretreated by electroless plating technique. The morphology, component, structure and magnetic property were characterized by SEM, EDS, XRD and VSM. The results clearly demonstrated that one-step method was in a condition to deposit on the surface of Nocadia, and the surface of plating was roughed with the increase of the spherical particles and decomposition products due to the effects of the load, the quality of plating and the utilization of electroless solution were the best when the load was 80 mL. The average contents of Ni, Fe and P element of the metal layer with 80 mL load (w) were about 83.17%, 6.12% and 10.71%, respectively. The magnetic property was changed little by increasing of the load, and the plating was amorphous. The electromagnetic parameters were measured by VNA, the results showed that the reflection loss could reach 27 dB at the frequency of 10～12 and 15～17 GHz when the thickness was 2 mm.

Key words: electroless, nocadia, pretreatment, load, wave absorbing materials