000			01302nam a2200205Ia 4500
008			220216s9999 xx 000 0 und d
100			_aHunyek A
245		0	_aMagnetic and dielectric properties of natural rubber and polyurethane composites filled with cobalt ferrite
260			_bPlastics, Rubber and Composites Macro Molecular Engineering _c2013
300			_a89-92
520			_aCobalt 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.
650			_aCobalt ferrite
650			_aElectrical permittivity
650			_aHysteresis loops
650			_aMagnetic permeability
650			_aNatural rubber
700			_a _Jantaratana _P
700			_aSirisathitkul C
942			_cJS
999			_c62355 _d62355