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

• Published in: Journal of alloys and compounds Vol. 364; no. 1; pp. 221 - 224
• Main Authors: Fu, Yen-Pei, Lin, Cheng-Hsiung, Pan, Ko-Ying
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 11.02.2004; Elsevier
• Subjects: Barium ferrite; Combustion synthesis; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Magnetic properties and materials; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Martensitic transformations; Materials science; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Saturation magnetization; VSM; Combustion synthesis; VSM; Barium ferrite; Saturation magnetization; Annealing; Magnetization; Microwave radiation; Differential thermal analysis; XRD; Experimental study; Ferrites; Barium oxides; Coercive force; Iron oxides
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(03)00501-2

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.