Low temperature transport properties of pyrolytic graphite sheet

Sachiko Nakamura, Daisuke Miyafuji, Takenori Fujii, Tomohiro Matsui, Hiroshi Fukuyama

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)

抄録

We have made thermal and electrical transport measurements of uncompressed pyrolytic graphite sheet (uPGS), a mass-produced thin graphite sheet with various thicknesses between 10 and 100 μm, at temperatures between 2 and 300 K. Compared to exfoliated graphite sheets like Grafoil, uPGS has much higher conductivities by an order of magnitude because of its high crystallinity confirmed by X-ray diffraction and Raman spectroscopy. This material is advantageous as a thermal link of light weight in a wide temperature range particularly above 60 K where the thermal conductivity is much higher than common thermal conductors such as copper and aluminum alloys. We also found a general relationship between thermal and electrical conductivities in graphite-based materials which have highly anisotropic conductivities. This would be useful to estimate thermal conductance of a cryogenic part made of these materials from its electrical conductance more easily measurable at low temperature.

本文言語英語
ページ(範囲)118-122
ページ数5
ジャーナルCryogenics
86
DOI
出版ステータス出版済み - 9月 2017
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 物理学および天文学一般

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