Title :
Production of magnetic nanocomposite by partial reduction of barium hexaferrite via mechanical ball milling
Author :
Molaei, M.J. ; Ataie, A. ; Raygan, Sh.
Author_Institution :
Sch. of Metall. & Mater. Eng., Univ. of Tehran, Tehran
Abstract :
Barium hexaferrite is a hard magnetic ceramic with superior magnetic properties and also low cost of production. Magnetic nanocomposites are a new grade of magnetic materials which exchange coupling may occur between their constituent phases due to their small particle sizes. In this work, barium hexaferrite nanocomposites were produced by partial reduction during ball milling with carbon and subsequent heat treating. Mechano-chemical process of barium hexaferrite powder with carbon can result in magnetic nanocomposites of this material. The effect of milling parameters on crystallite size and magnetic phases were investigated by XRD. Magnetic properties were measured using VSM.
Keywords :
X-ray diffraction; ball milling; barium compounds; ceramics; heat treatment; magnetic particles; magnetometers; nanocomposites; nanotechnology; particle size; permanent magnets; powders; reduction (chemical); BaFe12O19; VSM; XRD; barium hexaferrite; barium hexaferrite powder; exchange coupling; hard magnetic ceramics; heat treatment; high coercivity; magnetic nanocomposite; magnetic property; mechanical ball milling; mechano-chemical process; partial reduction; particle sizes; Ball milling; Barium; Ceramics; Costs; Couplings; Magnetic materials; Magnetic properties; Nanostructured materials; Powders; Production; Barium hexaferrite; ball milling; magnetic nanocomposites; partial reduction;
Conference_Titel :
Magnetic Recording Conference, 2009. APMRC '09. Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
978-9810-82191-3
DOI :
10.1109/APMRC.2009.4925379
