期刊
COMPOSITES COMMUNICATIONS
卷 12, 期 -, 页码 123-127出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2019.01.011
关键词
Core/shell structure; Ultrafine carbide; Magnetocaloric effect; Microwave absorption
资金
- National Natural Science Foundation of China [51671048]
- Fundamental Research Funds for the Central Universities [N170904001, N170908001]
- Research Funds for Innovation Talents in Universities and Colleges of Liaoning Province [LR2016003]
Traditional techniques for synthesizing ultrafine rare earth carbide particles involving high-temperature annealing processes are lack of effectiveness, resulting in an extreme limitation to fully explore their properties and potential applications. We herein demonstrate a modified arc-discharging approach to synthesize the core/shell structural ErC2@C nanoparticles, in which ultrafine ErC2 clusters with a mean diameter of 7.5 +/- 0.5 nm can be uniformly dispersed in carbon matrix ascribed to the non-equilibrium evaporation-condensation process. It is found that the ErC2@C nanoparticles present significant magnetocaloric and microwave absorption performances, corresponding to the magnetic entropy change of 8.7 J/kgK at 4 K with the magnetic field variation of 0-5 T, and the maximum reflection loss of -49 dB at 15 GHz for a 2.44 mm thick absorber. The present work thus provides an effective strategy for the synthesis of rare earth carbides and explores their potential applications in diverse fields.
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