Indexed by:Journal Article

Date of Publication:2017-07-01

Journal:MATERIALS RESEARCH EXPRESS

Included Journals:Scopus、SCIE

Volume:4

Issue:7

ISSN:2053-1591

Key Words:detonation synthesis; carbon encapsulation; nanopermalloy; superparamagnetism

Abstract:Carbon-encapsulated Fe-Ni alloy nanoparticles were synthesized through detonation using two composite explosive precursors doped with Fe (NO3)(3) center dot 9H(2)O and Ni(NO3)(2) center dot 6H(2)O center dot The morphology, components, and magnetism of the synthesized carbon-encapsulated alloy nanoparticles were characterized through x-ray diffraction studies (XRD, Rigaku, D/Max 2400, Japan), Raman spectroscopy (Raman, Thermo Fisher, DXR Microscope, USA), Transmission electron microscopy (TEM, FEI, Technai F30, USA) attached with energy dispersive x-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM, JDM-13, China) analyses. The denotation products of the two precursors were compared. The influence of the components of the two precursors on the products was also analyzed. Results showed that both precursors detonated and synthesized the carbon-encapsulated Fe-Ni nanoparticles with a core-shell structure. The grains exhibited sizes ranging from 10 nm to 100 nm and were uniformly distributed. The encapsulated metal core was mainly composed of different proportions of Fe and Ni. The outer shell was composed of graphite and amorphous carbon. VSM analysis indicated that the detonated composite nanoparticles showed superparamagnetism at room temperature.