Preparation of L1o-FeNi nanoparticles by sacrifice oxidation of boride nanoparticles

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05409
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nanomaterials chemistry
• Research Institution: Tohoku University
• Principal Investigator: Nakaya Masafumi 東北大学, 多元物質科学研究所, 助教 (80451681)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 犠牲酸化 / L10-FeNi

Outline of Final Research Achievements

We tried to prepare high ordered L10-FeNi nanoparticles, which are expected to apply for the permanent magnet and magnetic recording media with high performance. However, preparation of L10-FeNi phase is very difficult because the L10 phase is obtained at lower 320 degree C. Therefore, the traditional reduction technique cannot be used. Here we have tried to prepare L10-FeNi by the sacrifice oxidation of Fe-Ni-B.
First, we check the sacrifice oxidation on Ni. Ni-B nanoparticles on carbon carrier was prepared in water. Then, the sample was treated with oxygen. By XRD measurement, the formation of fcc-Ni (= metal nickel) phase was confirmed.
Next, we tried to prepare Fe-Ni-B nanoparticles and treat them by oxygen. Fe-Ni-B was prepared by reverse micelle method. The change of solution colors to black is observed. However, the Fe-Ni-B nanoparticles were very unstable. In next step, it is needed that the stabilizing method of Fe-Ni-B nanoparticles to obtain L10-FeNi.

Free Research Field

無機ナノ材料