Synthesis of FeCo Alloy Nanoparticles for Electromagnetic Absorber by Polyol Method.

The correlations among magnetic properties, synthesis temperature, and composition of FeCo nanoparticles were investigated herein. FeCo alloy nanoparticles synthesized at different temperatures (383, 393, 403, 413, 428, and 443 K) showed variable compositions and aggregation degrees of the FeCo nanoparticles. Under the optimized conditions of synthesis temperature of 403 K and duration of 1 h, FeCo nanoparticles were synthesized at molar ratios of 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, and 1:9.