Magnetic properties of nanocrystalline Fe/Fe₃C composites

Magnetic properties of carbon coated Fe, Co and Ni nanoparticles

“…In this study, when the reactive temperature is 650 • C, Fe and Fe 3 C are formed from the chemical reaction between melamine and Fe/Fe 3 O 4 . The product obtained at 700 • C consists of Fe and a small quantity of Fe 3 C, which can be ascribed to the decomposition of Fe 3 C [46]. All of Fe 3 C are decomposed to Fe and carbon to over 750 • C. The overall reactive processes can be speculated as follows:…”

Nitrogen doped carbon nanotubes with encapsulated ferric carbide as excellent electrocatalyst for oxygen reduction reaction in acid and alkaline media

“…1b, and the involved chemical reactions are displayed in supporting information. Prior to 600 C, melamine and ferric chloride are decomposed to form the thick graphite-like carbon nitride with encapsulated and supported amorphous Fe species [21]. From 600 to 650 C, amorphous Fe species is converted into iron oxide.…”

“…From 600 to 650 C, amorphous Fe species is converted into iron oxide. Part of the iron oxide is firstly reduced into elemental Fe and further reacts with carbon nitride species to form Fe 3 C [21]. Amorphous carbon dissolves in metal phase and graphitic layers are formed by the carbon-through-metal diffusion [20].…”

Superior thermal stability of polymer capped Fe3O4 magnetic nanoclusters

“…Recently, Shi et al showed that the structure of carbon encapsulated individual Fe 3 O 4 nanoparticles under inert annealing conditions is stable up to 600°C. Indeed, carbon encapsulated Fe 3 O 4 reduced into Fe and Fe 3 C at 700°C due to carbothermic reduction process . However, in the present nanoclusters case, we do not observe any trace of metallic Fe or Fe 3 C phases and hence we assume that the real time carbon capping on the surface of individual iron oxide nanoparticles of PCIO nanoclusters enhances the thermal stability of Fe 3 O 4 phase up to 1000°C.…”