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2018 | 133 | 3 | 694-696
Article title

Magnetic Separation of Graphite and Magnesia

Content
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Languages of publication
EN
Abstracts
EN
An ensemble of graphite and magnesia particles was successfully separated into different groups of materials by translating them in an area of magnetic field produced by a NdFeB magnetic-circuit. The absolute value of diamagnetic susceptibility |χ_{dia}| was 2.6×10¯⁷ emu/g in magnesia; previously the separation of diamagnetic grains was possible in materials with |χ_{dia}| values above 5×10¯⁷ emu/g. Terminal velocity observed in a area outside the magnetic field in the magnesia particles having different mass between 0.12 to 0.35 mg, converged to a constant value 1.27±0.05 cm/s; the value was consistent with a theoretical value based on a simple conversion rule between magnetic potential and kinetic energy assumed in the particles. Similar result was obtained for the graphite particles. The technical improvements introduced in the present study to translate the MgO particles can be applied to realize magnetic separation of diamagnetic materials in general.
Keywords
EN
Publisher

Year
Volume
133
Issue
3
Pages
694-696
Physical description
Dates
published
2018-03
Contributors
author
  • Institute of Earth & Space Science, Graduate school of Science Osaka University Toyonaka Osaka 560-0043 Japan
author
  • Institute of Earth & Space Science, Graduate school of Science Osaka University Toyonaka Osaka 560-0043 Japan
References
  • [1] K. Hisayoshi, C. Uyeda, K. Terada, Sci. Rep. 6, 38431 (2010), doi: 10.1038/serp38431
  • [2] For example, E. Beaugnon, R. Tournier, Nature 349, 470 (1991), doi: 10.1038/349470a0
  • [3] C. Uyeda, K. Hisayoshi, S. Kanou, J. Phys. Soc. Jpn. 79, 064709 (2010), doi: 10.1088/1742.6596/327/1/012058
  • [4] R. Gupta, Diamagnetism, Landort Bornstein, New Series II, Springer Berlin 1983, p. 445
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv133n3p109kz
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