Synthesis of Ce-Based RE2Fe14B by Solid-State Reaction and Reduction-Diffusion Process
Source abstract
Abstract
Rare-earth permanent magnets, such as Nd2Fe14B, have been widely used in electric vehicle and wind turbine motors due to their high anisotropy field (Ha), saturation magnetization (Ms) and coercivity (Hc). Cerium (Ce) has gained attention as a potential alternative to neodymium (Nd) due to its high abundance and low cost. The relatively poor intrinsic magnetic properties of Ce magnets, however, remain a significant challenge for their industrial applications. In this study, the synthesis of Ce-based RE2Fe14B (2-14-1) phases was achieved by a modified reduction-diffusion (R-D) process using REFeO3 (RE = Ce, Nd) as a precursor. The precursor was prepared by a solid-state reaction with CeO2, Nd2O3, Fe2O₃ and Fe powders, which is a much more suitable process for mass production and cost-effectiveness. Optimal composition and heat treatment conditions enabled the formation of single-phase Ce-based 2-14-1 particles. The as-synthesized single-phase Ce2Fe14B particles exhibited an Ms value of ~120 emu/g and an intrinsic coercivity (Hci) value of ~85 Oe, which can be attributed to the large particle size as observed by FE-SEM.
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Research context
OpenAlex topics: Magnetic Properties of Alloys · Rare-earth and actinide compounds · Advancements in Battery Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea
Department of Materials Science & Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea
Department of Materials Science and Engineering, Hongik University, Sejong 30016, Republic of Korea
Nano Materials Research Division, Korea Institute of Materials Science, Changwon 51508, Republic of Korea
Funding
Ministry of Trade, Industry and Energy (MOTIE)
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