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Title: Synthesis And Characterization Of Reduced Size Ferrite Reinforced Polymer Composites

Small sized Co{sub 1-x}Ni{sub x}Fe{sub 2}O{sub 4} ferrite particles are synthesized by chemical route. The precursor materials are annealed at 400, 600 and 800 C. The crystallographic structure and phases of the samples are characterized by X-ray diffraction (XRD). The annealed ferrite samples crystallized into cubic spinel structure. Transmission Electron Microscopy (TEM) micrographs show that the average particle size of the samples are <20 nm. Particulate magneto-polymer composite materials are fabricated by reinforcing low density polyethylene (LDPE) matrix with the ferrite samples. The B-H loop study conducted at 10 kHz on the toroid shaped composite samples shows reduction in magnetic losses with decrease in size of the filler sample. Magnetic losses are detrimental for applications of ferrite at high powers. The reduction in magnetic loss shows a possible application of Co-Ni ferrites at high microwave power levels.
Authors:
;  [1]
  1. Microwave Engineering Laboratory, Department of Physics, Tezpur University, Napaam, Tezpur-784028 (India)
Publication Date:
OSTI Identifier:
21137092
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1003; Journal Issue: 1; Conference: ICMM-2007: International conference on magnetic materials, Kolkata (India), 11-16 Dec 2007; Other Information: DOI: 10.1063/1.2928960; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; COBALT COMPOUNDS; COMPOSITE MATERIALS; EDDY CURRENTS; FERRITES; KHZ RANGE; MICROWAVE RADIATION; NICKEL COMPOUNDS; PARTICLE SIZE; PARTICLES; POLYETHYLENES; REINFORCED MATERIALS; SYNTHESIS; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION