02294nas a2200241   4500008004100000022001400041245010300055210006900158260008700227300001200314490000700326520137000333653002301703653002301726653002201749653003701771653002201808100002001830700001501850700003301865700002501898856012901923       2005                        eng d  a0095-244300aCure characteristics and dielectric properties of magnetic composites containing strontium ferrite0 aCure characteristics and dielectric properties of magnetic compo  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcAPR  a109-1210 v373 a<p>Hexagonal strontium ferrite (SrFe12O19) powders were synthesized by the conventional ceramic techniques. They were then characterized by the X-ray diffraction method and incorporated in the natural rubber matrix according to a specific recipe for various loadings of ferrite to produce rubber ferrite composites (RFCs). The processability of these compounds was determined by evaluating the cure characteristics namely, scorch time, cure time, minimum and maximum torque. The evaluation of the dielectric properties of ceramic strontium ferrite (SrF), natural rubber gum vulcanizate, and RFCs were done with the help of a Hewlett Packard (HP) impedance analyzer. The magnetic properties of these composites were studied using a Vibrating Sample Magnetometer (VSM). The effect of carbon black on the processability, and the magnetic and dielectric properties were also studied by the incorporation of carbon black into these composites. It has been found that the addition of these ferrites and carbon black does not affect the processability of these composites, whereas the physical properties are found to be modified. From the magnetic and dielectric measurements it has been found that flexible magnets having appropriate dielectric strength can be prepared by the incorporation of appropriate amount of SrF and carbon black in the natural rubber matrix.</p>10ahexagonal ferrites10aMagnetic materials10apermanent magnets10arubber ferrite composites (RFCs)10astrontium ferrite1 aSoloman, M., A.1 aKurian, P.1 aAnantharaman, Maliemadom, R.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/cure-characteristics-and-dielectric-properties-magnetic-composites-containing-strontium-001882nas a2200241   4500008004100000022001400041245011400055210006900169260008900238300001200327490000700339520096200346653001901308653001701327653002301344653001901367653003001386100002001416700001501436700003301451700002501484856013101509       2005                        eng d  a0971-457X00aMagnetic and processability studies of nitrile rubber vulcanisates containing barium ferrite and carbon black0 aMagnetic and processability studies of nitrile rubber vulcanisat  aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcSEP  a582-5870 v123 a<p>Fine particles of barium ferrite (BaFe12O19) belonging to the M-type hexagonal ferrites were prepared by the conventional ceramic techniques. They were incorporated into a nitrile rubber matrix according to a specific recipe for various loadings to produce rubber ferrite composites (RFC)The percolation threshold is not reached for a maximum loading of 130 phr (parts per hundred rubber). Here in this paper, the magnetic properties and processability of the nitrile rubber based RFCs containing barium ferrite (BaF) and HAF carbon black is reported. The magnetic properties of the ceramic ferrite and these rubber ferrite composites were evaluated and it was found that the coercivity values of RFCs were less than that of the ceramic BaF, but remained constant with the loading of both the ferrite filler and carbon black. However, other properties like saturation magnetization and magnetic remanence increased with the loading of ferrite filler.</p>10abarium ferrite10acarbon black10aMagnetic materials10anitrile rubber10arubber ferrite composites1 aSoloman, M., A.1 aKurian, P.1 aAnantharaman, Maliemadom, R.1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/magnetic-and-processability-studies-nitrile-rubber-vulcanisates-containing-barium-ferrite-001908nas a2200217   4500008004100000022001400041245012100055210006900176260012500245300001100370490000800381520101800389100001901407700002001426700001901446700001601465700001901481700002501500700003301525856013201558       2014                        eng d  a0021-897900aFlexible microwave absorbers based on barium hexaferrite, carbon black, and nitrile rubber for 2-12 GHz applications0 aFlexible microwave absorbers based on barium hexaferrite carbon   aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScJUL  a0249020 v1163 a<p>Flexile single layer electromagnetic wave absorbers were designed by incorporating appropriate amounts of carbon black in a nitrile butadiene rubber matrix along with an optimized amount of magnetic counterpart, namely, barium hexaferrite for applications in S, C, and X-bands. Effective dielectric permittivity and magnetic permeability were measured using cavity perturbation method in the frequency range of 2-12 GHz. The microwave absorbing characteristics of the composites were studied in the S, C, and X-bands employing a model in which an electromagnetic wave is incident normally on a metal terminated single layer. Reflection loss exceeding -20 dB is obtained for all the samples in a wide frequency range of 2-12 GHz when an appropriate absorber thickness between 5 and 9 mm is chosen. The impact of carbon black is clearly observed in the optimized composites on the mechanical strength, thickness, band width of absorption, dielectric properties, and absorptivity. (C) 2014 AIP Publishing LLC.</p>1 aVinayasree, S.1 aSoloman, M., A.1 aSunny, Vijutha1 aMohanan, P.1 aKurian, Philip1 aJoy, Pattayil, Alias1 aAnantharaman, Maliemadom, R.  uhttps://library.ncl.res.in/content/flexible-microwave-absorbers-based-barium-hexaferrite-carbon-black-and-nitrile-rubber-2-12-0