Barium ferrite powders prepared by microwave-induced combustion process and some of their properties

Abstract

Barium ferrite powders were successfully synthesized by a microwave-induced combustion process. The process takes only a few minutes to obtain calcined barium ferrite powders. The resultant powders were investigated by XRD, SEM, VSM, TG/DTA, and a surface area measurement. The as-received product shows the barium ferrite with saturation magnetization ( M s)≈23 emu/g and an intrinsic coercive force ( i H c) of 595 Oe, whereas upon annealing at 1000 °C for 2 h, the saturation magnetization ( M s) increases to 66 emu/g and the intrinsic coercive force ( i H c) reaches 2100 Oe.