Morphology Modification of MoO3 Powders by Hydrogen Reduction and Re-Oxidation Process

Authors

  • Youngmin Kim Seoul National University of Science And Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea https://orcid.org/0009-0001-3394-8311
  • Ji Young Kim Seoul National University of Science And Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  • Ji Won Choi Seoul National University of Science And Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea https://orcid.org/0009-0004-0070-5761
  • Eui Seon Lee Seoul National University of Science And Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea https://orcid.org/0000-0001-6405-7303
  • Sung-Tag Oh Seoul National University of Science And Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea https://orcid.org/0000-0003-4556-4291

DOI:

https://doi.org/10.24425/amm.2025.154453

Abstract

An optimum route to fabricate the MoO3 nanoparticles with modified morphology was investigated. Microstructure analysis for the MoO3 powder prepared by high-energy ball milling process for 25 h showed that the plate-shaped raw powders are mostly converted into equiaxed fine particles, but exist as large agglomerates. However, the powder fabricated by the hydrogen reduction at 775℃ of raw powder and re-oxidation at 450℃ exhibits equiaxed fine particles with a size of about 260 nm and relatively small agglomerates. Additionally, the re-oxidized particles show a unimodal particle size distribution with measured values ranging from 0.18 to 0.42 μm. These results indicated that the reduction and re-oxidation process can significantly decrease the particle size and modify the powder morphology into an equiaxed shape.

Published

2025-09-30

How to Cite

Kim, Youngmin, et al. “Morphology Modification of MoO3 Powders by Hydrogen Reduction and Re-Oxidation Process”. Archives of Metallurgy and Materials, vol. 70, no. 3, Sept. 2025, doi:10.24425/amm.2025.154453.

Issue

Vol. 70 No. 3 (2025)

Section

Articles