Electromagnetic Wave Absorption Properties of FeCo/Y_2O_3 Nanocomposite Derived From Y_2(Fe_(0.5)Co_(0.5))_(17) Intermetallic Compound

摘要

Nanocomposite materials consisting of fine particles of FeCo (approx 30 nm) and Y_2O_3 (approx 15 nm) has been prepared from intermetallic compound Y_2(Fe_(0.5)Co_(0.5))_(17) by melt-spun technique and the subsequent treatments of hydrogenation-disproportionation and oxidation. The resin composites with 80 wt percent FeCo/Y_2O_3 powders showed excellent electromagnetic wave absorption properties (RL<-20 dB) in a frequency range of 2.7-8.1 GHz, with thickness of 5.7-2.2 mm, respectively.