Details

Autor(en) / Beteiligte

• Septiani, Eka Lutfi
• Kikkawa, Jun
• Cao, Kiet Le Anh
• Hirano, Tomoyuki
• Okuda, Nobuhiro
• Matsumoto, Hiroyuki
• Enokido, Yasushi
• Ogi, Takashi

Titel

Direct synthesis of submicron FeNi particles via spray pyrolysis using various reduction agents

Ist Teil von

• Advanced powder technology : the international journal of the Society of Powder Technology, Japan, 2021-11, Vol.32 (11), p.4263-4272

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• [Display omitted] •Submicron-sized FeNi particle is successfully produced via direct spray pyrolysis.•Reduction agent types determine the reduction degree in the synthesis process.•Specific reduction agent led to different particles morphology and crystal structure.•The FeNi particles were extensively examined at various doses of reduction agents.•FeNi particles formation was proposed based on decomposition analysis and modelling. Preparing spherical and submicron FeNi particles in a simple, rapid, and harmless process is highly desirable for various applications yet severely challenging. Herein, we successfully synthesized the FeNi particles from their metal salts in a relatively low reduction atmosphere using three types of reduction agent, i.e., ethanol, ethylene glycol, and formic acid, via spray pyrolysis. The reduction agents were tested over a concentration range of 0–30 vol%. The type and concentration of reduction agents show a crucial role in the formation of FeNi particles. At higher concentrations (25 vol%), ethanol and ethylene glycol produced smooth and spherical FeNi particles of submicron size, 284 ± 1.6 and 399 ± 1.5 nm respectively, whereas formic acid produced particles with an irregular and Janus shape comprising FeNi and FeO, with a size of 396 ± 1.5 nm. A plausible metal salt reduction mechanism was proposed for the different reduction agents. The reduction agent type not only influences the reduction degree but also particle morphology during synthesis. This finding opens new opportunities to adjust the FeNi particles with respect to varied purposes by manipulating reduction agents.