International Conference on Applications of Radiation Science and Technology

Fabrication of Advanced Soft Magnetic Nanomaterials Using the Radiation

27 Apr 2017, 14:15

2h

IAEA Board Room B/M1 (IAEA Headquarters)

Poster RADIATION SYNTHESIS AND MODIFICATION OF MATERIALS P-A2

Speaker

Mr Seungho Yu (Korea Atomic Energy Research Institute, Korea, Republic of)

Description

Soft magnetic materials have been investigated for applications in magnetic devices such as transformers, inductor, electromagnetic (EM) wave shielding, etc. Its magnetic properties are determined by composition, crystal structures and size. Many kinds of researches are focused on the control of material size chemically and mechanically. Synthesis of particles using an electron beam (EB) irradiation provides stable and high quality. In this study, we synthesized the iron oxide particles using a 10 MeV EB irradiation. This material has fine nano-sphere with Fe3O4 phase in the result analysis of FE-SEM and XRD. And it also possible to fabricate the α-Fe2O3 phase with different precursor compositions. As increasing the electron beam irradiation dose, the saturation magnetization of particles dramatically increased up to 300 kGy. This result is related to the growth of crystal phase. To evaluate the uses of this material in high frequency, the complex permittivity and permeability of composite were measured by network analyzer from 300 kHz to 8.5 GHz in forms of composite in wax matrix. This material shows the high return loss (over than -40 dB) near the 6 GHz. These results clearly demonstrate that the radiation is a good candidate for the nanoparticle fabrication and industrial applications.