Magnetic and dielectric properties of natural rubber and polyurethane composites filled with cobalt ferrite
Material type:
TextPublication details: Plastics, Rubber and Composites Macro Molecular Engineering 2013Description: 89-92Subject(s): Summary: Cobalt ferrite (CoFe2O4) powders synthesised by sol-gel techniques were incorporated into natural rubber (NR) and polyurethane (PU) by two-roll milling at different loadings from 0 to 45 phr. In either NR or PU composites, the magnetisations were proportional to the CoFe2O4 loading, but the coercive field remained rather insensitive to the loading. The frequency response from 1 MHz revealed that the real part of the magnetic permeability increased significantly only in the case of 45 phr CoFe2O4, while the imaginary part was modest in both NR and PU composites, and both parts at 100 MHz had linear variations with the loading, in agreement with Wagners equation.
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Journals
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RRII Library Rubber technology | Volume 42, Issue 3 | Journals |
Cobalt ferrite (CoFe2O4) powders synthesised by sol-gel techniques were incorporated into natural rubber (NR) and polyurethane (PU) by two-roll milling at different loadings from 0 to 45 phr. In either NR or PU composites, the magnetisations were proportional to the CoFe2O4 loading, but the coercive field remained rather insensitive to the loading. The frequency response from 1 MHz revealed that the real part of the magnetic permeability increased significantly only in the case of 45 phr CoFe2O4, while the imaginary part was modest in both NR and PU composites, and both parts at 100 MHz had linear variations with the loading, in agreement with Wagners equation.
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