skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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

Citation Formats

Borah, Subasit, and Bhattacharyya, Nidhi S. Synthesis And Characterization Of Reduced Size Ferrite Reinforced Polymer Composites. United States: N. p., 2008. Web. doi:10.1063/1.2928960.
Borah, Subasit, & Bhattacharyya, Nidhi S. Synthesis And Characterization Of Reduced Size Ferrite Reinforced Polymer Composites. United States. doi:10.1063/1.2928960.
Borah, Subasit, and Bhattacharyya, Nidhi S. 2008. "Synthesis And Characterization Of Reduced Size Ferrite Reinforced Polymer Composites". United States. doi:10.1063/1.2928960.
@article{osti_21137092,
title = {Synthesis And Characterization Of Reduced Size Ferrite Reinforced Polymer Composites},
author = {Borah, Subasit and Bhattacharyya, Nidhi S.},
abstractNote = {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.},
doi = {10.1063/1.2928960},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1003,
place = {United States},
year = 2008,
month = 4
}
  • The goal of this study was to prepare SiC-reinforced silicon matrix composites. Chemical vapor deposition techniques were employed to deposit Si onto the surface of SiC fibers and to infiltrate silicon carbide fibers to form a cylindrical composite. A mixture of SiCl{sub 4} and H{sub 2} was reacted at 1,000{degree}C to produce the Si coating. The morphology of Si deposition was monitored by scanning electron microscopy. The structural properties of the composite were studied by powder x-ray diffraction methods. Surface studies of the composites were investigated with x-ray photoelectron spectroscopy.
  • The Zr[sub 57]Nb[sub 5]Al[sub 10]Cu[sub 15.4]Ni[sub 12.6] bulk metallic glass forming liquid is reinforced with WC, SiC, W, or Ta particles. Structure, microstructure and thermal stability of the composites are studied by X-ray diffraction, optical microscopy and differential scanning calorimetry. The metallic glass matrix remains amorphous after adding up to 20 vol.% of particles. The reactions at the interfaces between the matrix and the different reinforcing materials are investigated with scanning electron microscopy, transmission electron microscopy and electron microprobe. The mechanical properties of the composites are studied in compression and tension. The influence of the introduced particles on the thermalmore » stability of the matrix as well as on the mechanical properties is discussed.« less
  • In the last decade, natural fiber composites have experienced rapid growth in the European automotive market, and this trend appears to be global in scale, provided the cost and performance is justified against competing technologies. However, mass reduction, recyclability, and performance requirements can be met today by competing systems such as injection-molded unreinforced thermoplastics; natural fiber composites will continue to expand their role in automotive applications only if such technical challenges as moisture stability, fiber-polymer interface compatibility, and consistent, repeatable fiber sources are available to supply automotive manufacturers. Efforts underway by Tier I and II automotive suppliers to explore hybridmore » glass-natural fiber systems, as well as applications that exploit such capabilities as natural fiber sound dampening characteristics, could very well have far-reaching effects. In addition, the current development underway of bio-based resins such as Polyhydroxyalkanoate (PHA) biodegradable polyesters and bio-based polyols could provide fully bio-based composite options to future automotive designers. In short, the development of the natural fiber composite market would make a positive impact on farmers and small business owners on a global scale, reduce US reliance on foreign oil, improve environmental quality through the development of a sustainable resource supply chain, and achieve a better CO2 balance over the vehicle?s lifetime with near-zero net greenhouse gas emissions.« less
  • The magnetic properties of polycrystalline NiZn ferrite nanoparticles synthesized using a polyol-reduction and coprecipitation reaction methods have been investigated. The effects on magnetization of synthesis approach, chemical composition, processing conditions, and on the size of nanoparticles on magnetization have been investigated. The measured room-temperature magnetization for the as-prepared magnetic nanoparticles (MNP) synthesized via polyol-reduction and coprecipitation is 69 Am{sup 2} kg{sup −1} and 14 Am{sup 2} kg{sup −1}, respectively. X-ray diffraction measurements confirm spinel structure of the particles with an estimated grain size of ∼80 nm obtained from the polyol-reduction and 28 nm obtained from these coprecipitation techniques. Upon calcination under atmospheric conditions at different temperaturesmore » between 800 °C and 1000 °C, the magnetization, M, of the coprecipitated MNP increases to 76 Am{sup 2} kg{sup −1} with an estimated grain size of 90 nm. The MNP-polymer nanocomposites made from the synthesized MNP in various loading fraction and high density polyethylene exhibit interesting electromagnetic properties. The measured permeability and permittivity of the magnetic nanoparticle-polymer nanocomposites increases with the loading fractions of the magnetic nanoparticles, suggesting control for impedance matching for antenna applications.« less