title: Synthesis of chromium-nickel nanoparticles prepared by a microemulsion method and mechanical milling.
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.
authors.forename: Irena
authors.initials: I
authors.lastname: Ban
authors.forename: Janja
authors.initials: J
authors.lastname: Stergar
authors.forename: Miha
authors.initials: M
authors.lastname: Drofenik
authors.forename: Gregor
authors.initials: G
authors.lastname: Ferk
authors.forename: Darko
authors.initials: D
authors.lastname: Makovec
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D004655:Emulsions; D053758:Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D033362:Powder Diffraction; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D004655:Emulsions; D002857:Chromium; D009532:Nickel