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Preparation and Properties of Barium Ferrite Using Hot‐Rolled Mill Scale
Author(s) -
Chien YungTsen,
Pan HongChih,
Ko YungChao
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb07646.x
Subject(s) - coercivity , materials science , barium carbonate , barium , metallurgy , barium ferrite , remanence , ferrite (magnet) , magnet , raw material , mill scale , pressing , anisotropy , composite material , magnetization , chemistry , magnetic field , mechanical engineering , physics , organic chemistry , quantum mechanics , engineering , condensed matter physics
Commercial‐quality barium ferrite was made on a laboratory scale by the solid‐state reaction of raw hot‐rolled mill scale and barium carbonate. The quality of the isotropic magnets reached coercivity H c 1750 Oe, remanence B r 2200 G, and maximum energy product ( BH ) max 1.0 × 10 6 G · Oe and that of the anisotropic magnets formed by dry powder die pressing H c 2000 Oe, B r 3500 G, and ( BH ) max 2.6 × 10 6 G · Oe. The amount of the additives was in the range 0.4 to 0.8 wt%. The processing parameters were reported. The mechanism of ferrite formation was proposed.