The effect of cooling rate on the magnetic properties of the Fe53Nd37Al10 alloy prepared by different methods, i.e., suction casting and melt spinning at different rates, was investigated. The Fe53Nd37Al10 ribbon at the wheel speed of 5m·s-1 exhibits the highest coercivity in the samples. Two hard magnetic phases are detected from the hysteresis loops of the 5m·s-1 ribbon at all temperatures below room temperature. Their appearance is associated with different exchange coupling interactions, which are between the two kinds of hard magnetic phases or between the hard magnetic phase and the soft magnetic phase.
This paper designs and fabricates CeO_2 nanoparticles on a large scale by hydrolysis and oxidation of cerium carbide.The electrochemical supercapacitor behavior of CeO_2 nanoparticles was investigated.The nickel foam(NF) supported CeO_2 nanoparticles show a high areal capacitance of 119 mF/cm^2,demonstrating a strong synergistic effect between NF and CeO_2 nanoparticles.The high capacitance of the CeO_2/NF nanoparticles is possibly due to an improved conductivity by NF and a better utilization of CeO_2 nanoparticles.
