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Łabędź, O.
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article
Controlling the diameter and magnetic properties of carbon-encapsulated iron nanoparticles produced by carbon arc discharge
Abstract
The systematic studies on synthesis of carbon-encapsulated iron nanoparticles by a carbon arc route arepresented. The influence of several operational parameters (Fe content in the anode (7.5–65.0 at.%),discharge current (30–80 A), and preparation procedure of the anode) on the yield, selectivity, morphology,diameter distribution, phase composition, graphitization degree and magnetic properties of the products isinvestigated. It is found that Fe content in the anode is a parameter that entirely controls the yield, diameterdistribution, graphitization degree and magnetic properties of carbon-encapsulated iron nanoparticles. Thisparameter also influences the process selectivity. Two other factors, i.e. the discharge current and preparationprocedure of the anode, slightly affect the product morphology, diameter distribution and graphitizationdegree. The phase composition neither depends on the Fe content in the anode nor the discharge current.It is also found that the studied synthesis process has high reproducibility and has a potential to be scaled up.