Magnetic Properties of Amorphous FeSiB and Nanocrystalline Fe_(73)Si_(16)B_7Nb_3Cu_1 Soft Magnetic Sheets

摘要

The magnetic inductance of nanocrystalline Fe_(73)Si_(16)B_7Nb_3Cu_1 and an amorphous FeSiB sheet has been investigated to identify the radiofrequency identification (RFID) performance. Planar flow cast amorphous ribbons were pulverized and classified using a stack of sieve. The powder was mixed with binder and solvent and tape-casted to form 0.6-0.8 mm thick films. The inductance of the sheet was measured to investigate the RFID characteristics of the nanocrystalline and the amorphous materials. Results showed that the atmosphere for annealing significantly influenced on the inductance of the material. The surface oxidation of the particles was the main reason for the reduced inductance. The maximum inductance of Fe_(73)Si_(16)B_7Nb_3Cu_1 alloy was about 88u,H at 17.4 MHz, which was about 65% greater compared to the amorphous FeSiB alloy. The higher inductance in the nanocrystalline alloy indicates that it may be used as a potential replacement of current RFID materials.