Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152462 | Journal of Magnetism and Magnetic Materials | 2018 | 6 Pages |
Abstract
The CoFeBSiNb soft magnetic metallic glasses with strong glass forming ability were selected as microwave absorption materials for the first time. The metallic glass powders (MGPs) were prepared through milling and hydrochloric acid treatments. The effects of mass fraction of MGPs in wax composites and corrosion treatment on the microwave absorbing properties were investigated in details. The results demonstrated that the complex permittivity and permeability of the composites increased gradually as the MGPs mass fraction increased. Through chemical corrosion, the complex permittivity of the metallic glasses apparently increased, which due to the strengthened interfacial polarization caused by the porous surface structures. As a result, the minimum value of reflection loss (RL) for the composites containing 60â¯wt% of MGPs corroded for one hour under pHâ¯=â¯2 reached â45.2â¯dB at 14.64â¯GHz with a thickness of only 2.3â¯mm and the bandwidth reached 14â¯GHz for RLâ¯<â¯â10â¯dB or 6.2â¯GHz for RLâ¯<â¯â20â¯dB.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hao Zheng, Weihua Yao, Huaijun Sun, Guoxiu Tong,