The effect of magnetic powders and powders loading on magnetic properties and
mechanical properties of magnetic rubbers were studied. The natural rubber with magnetic powders,
Barium ferrite, Neodymium iron boron, were used as starting materials to prepare magnetic rubbers.
Barium ferrite (BaO.6F2O3) powders had been sintered at 1285 oC for 30 hours to improve its
crystal structure. The physical properties of magnetic rubbers, residual flux density (Br), coercive
force (Hc), maximum energy product (BHmax), hardness and density, had a trend to increase as
enhancing magnetic powders loading. However, some properties such as, intrinsic coercive force
(Hci), tensile strength and elongation at break, had a trend to decrease when the magnetic powder
loading was increased. Magnetic properties of the anisotropic type, sintered powders, were higher
than isotropic type, non-sintered powders, except the Hci because anisotropic magnetic rubber
indicated crystal orientation in the same direction.
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