|1Boshitskaya, NV, 1Kushchevskaya, NF, 1Baglyuk, GA, 1Kurovskii, VYa., 1Goncharuk, DA |
1I. M. Frantsevich Institute for Problems of Materials Sciences of the NAS of Ukraine, Kyiv
|Dopov. Nac. akad. nauk Ukr. 2014, 2:92-97|
|Section: Materials Science|
A comparative investigation of nanopowders produced by the decomposition of oxalate and citrate salts of iron in the temperature range of 250–450 ºC and their reduction in hydrogen and a modified method of subsequent prolonged passivation of the iron powder surface obtained by the controlled substitution of hydrogen protective atmosphere by air mixture over a period of 5–8 h is performed. It is shown that the phase composition of the obtained iron nanopowders significantly depends on the composition of the initial charge: at the decomposition of iron citrate at 400–450 ºC, α-Fe nanopowder was obtained, while the decomposition of iron oxalate at the same temperatures gave a mixture of α-Fe and Fe3O4. The average size of the obtained powders is ∼ 100 nm.
|Keywords: Fe, low-temperature synthesis, nanopowders|