Synthesis of cobalt nanoparticles to enhance magnetic permeability of metal-polymer composites

Pirjo Koskela (Corresponding Author), M. Teirikangas, A. Alastalo, J. Forsman, J. Juuti, U. Tapper, A. Auvinen, H. Seppä, Heli Jantunen, J. Jokiniemi

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Metallic cobalt nanoparticles were synthesized by hydrogen reduction method. Particles were coated in situ with carbon by adding ethene to reaction flow. Particles were characterized by transmission electron microscopy, energy dispersive X-ray emission, X-ray diffraction, X-ray fluorescence and BET method. The observed cobalt particle size distributions in different cobalt batches produced with unvarying reaction parameters was reproducible: The mean diameter of primary cobalt particle varied only 5% from the mean value of 76 nm in different batches. Increased carbon precursor concentration decreased mean diameter of cobalt particles to 17 nm. The produced nanoparticles were used as filler material in 0–3 type metal–polymer composites. Composite samples with varying filler loading were fabricated with mixing extrusion and injection moulding techniques. The magnetic properties of the fabricated composites were measured up to 1 GHz. In order to analyse the particle distribution in composite matrix and its effect on magnetic properties the microstructure was studied.
Original languageEnglish
Pages (from-to)649-656
Number of pages8
JournalAdvanced Powder Technology
Volume22
Issue number5
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Magnetic permeability
Cobalt
Polymers
Metals
Nanoparticles
Composite materials
Fillers
Magnetic properties
Carbon
Extrusion molding
X rays
Injection molding
Particle size analysis
Hydrogen
Fluorescence
Transmission electron microscopy
X ray diffraction
Microstructure

Keywords

  • Magnetic nanoparticles
  • cobalt
  • polymer-matrix composite (PMC)
  • magnetic properties
  • modelling

Cite this

Koskela, Pirjo ; Teirikangas, M. ; Alastalo, A. ; Forsman, J. ; Juuti, J. ; Tapper, U. ; Auvinen, A. ; Seppä, H. ; Jantunen, Heli ; Jokiniemi, J. / Synthesis of cobalt nanoparticles to enhance magnetic permeability of metal-polymer composites. In: Advanced Powder Technology. 2011 ; Vol. 22, No. 5. pp. 649-656.
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abstract = "Metallic cobalt nanoparticles were synthesized by hydrogen reduction method. Particles were coated in situ with carbon by adding ethene to reaction flow. Particles were characterized by transmission electron microscopy, energy dispersive X-ray emission, X-ray diffraction, X-ray fluorescence and BET method. The observed cobalt particle size distributions in different cobalt batches produced with unvarying reaction parameters was reproducible: The mean diameter of primary cobalt particle varied only 5{\%} from the mean value of 76 nm in different batches. Increased carbon precursor concentration decreased mean diameter of cobalt particles to 17 nm. The produced nanoparticles were used as filler material in 0–3 type metal–polymer composites. Composite samples with varying filler loading were fabricated with mixing extrusion and injection moulding techniques. The magnetic properties of the fabricated composites were measured up to 1 GHz. In order to analyse the particle distribution in composite matrix and its effect on magnetic properties the microstructure was studied.",
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Synthesis of cobalt nanoparticles to enhance magnetic permeability of metal-polymer composites. / Koskela, Pirjo (Corresponding Author); Teirikangas, M.; Alastalo, A.; Forsman, J.; Juuti, J.; Tapper, U.; Auvinen, A.; Seppä, H.; Jantunen, Heli; Jokiniemi, J.

In: Advanced Powder Technology, Vol. 22, No. 5, 2011, p. 649-656.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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AU - Koskela, Pirjo

AU - Teirikangas, M.

AU - Alastalo, A.

AU - Forsman, J.

AU - Juuti, J.

AU - Tapper, U.

AU - Auvinen, A.

AU - Seppä, H.

AU - Jantunen, Heli

AU - Jokiniemi, J.

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AB - Metallic cobalt nanoparticles were synthesized by hydrogen reduction method. Particles were coated in situ with carbon by adding ethene to reaction flow. Particles were characterized by transmission electron microscopy, energy dispersive X-ray emission, X-ray diffraction, X-ray fluorescence and BET method. The observed cobalt particle size distributions in different cobalt batches produced with unvarying reaction parameters was reproducible: The mean diameter of primary cobalt particle varied only 5% from the mean value of 76 nm in different batches. Increased carbon precursor concentration decreased mean diameter of cobalt particles to 17 nm. The produced nanoparticles were used as filler material in 0–3 type metal–polymer composites. Composite samples with varying filler loading were fabricated with mixing extrusion and injection moulding techniques. The magnetic properties of the fabricated composites were measured up to 1 GHz. In order to analyse the particle distribution in composite matrix and its effect on magnetic properties the microstructure was studied.

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