Synthesis of Chromium-Nickel Nanoparticles Prepared by a Microemulsion Method and Mechanical Milling

Authors

  • Irena Ban University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova 17, SI-2000 Maribor, Slovenia, Center of Excellence NAMASTE, Jamova 39, SI-1000 Ljubljana, Slovenia
  • Janja Stergar University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova 17, SI-2000 Maribor, Slovenia
  • Miha Drofenik University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova 17, SI-2000 Maribor, Slovenia, Jožef Stefan Institute, Department for Materials Synthesis, Jamova 39, SI-1000 Ljubljana, Slovenia
  • Gregor Ferk University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova 17, SI-2000 Maribor, Slovenia
  • Darko Makovec Jožef Stefan Institute, Department for Materials Synthesis, Jamova 39, SI-1000 Ljubljana, Slovenia

Keywords:

Mechanical alloying, magnetic nanoparticles, magnetic hyperthermia, Curie point.

Abstract

A chemical and a physical method have been applied for the preparation of chromium-nickel alloy nanoparticles. These particles were designed to be used for controlled magnetic hyperthermia applications. Microemulsions with Ni2+ and Cr3+ and/or NaBH4 as precursors were prepared using the isooctane/CTAB, n-butanol/H2O system. The samples of CrxNi1-x nanoparticles with the desired composition were obtained after the reduction of their salts with NaBH4 and afterwards heat treated in a TGA in a N2 atmosphere at various temperatures. The CrxNi1-x materials were also prepared by mechanical milling. Utilizing a ball-to-powder mass ratio of 20 : 1 and selecting the proper alloy compositions we were able to obtain nanocrystalline CrxNi1-x particles. Thermal demagnetization in the vicinity of the Curie temperature of the nanoparticles was studied using a modified TGA-SDTA method. The alloy’s phase composition, size and morphology were determined with XRD measurements and TEM analyses.

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Published

13.01.2014

Issue

Vol. 60 No. 4 (2013)

Section

Materials science

License

Except where otherwise noted, articles in this journal are published under the Creative Commons Attribution 4.0 International License