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Thermal Management Material: Graphite
Author(s) -
Inagaki Michio,
Kaburagi Yutaka,
Hishiyama Yoshihiro
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201300418
Subject(s) - graphite , materials science , thermal conductivity , diamond , composite material , anisotropy , thermal insulation , layer (electronics) , optics , physics
Graphite has pronounced anisotropy in its properties. Thermal conductivity of graphite crystal is extremely high along its layer plane, as high as 2000 Wm −1 K −1 , much higher than metals, and very low across its layer plane, as low as 7 Wm −1 K −1 . This anisotropy gives high possibility for graphite as thermal management materials. Here, graphite membranes with high thermal conductivity along the surface for heat dissipation and with low conductivity perpendicular to the surface for heat insulation, in addition to graphite foams as container of phase change materials for heat energy storage, are reviewed, particularly referring to the preparations of various graphite materials. Thermal conductivity of diamond crystal is also high, 2500 Wm −1 K −1 , but it is very sensitive for structural defects, but that of graphitic materials is less sensitive for structural defects, suggesting that the latter is more practical for thermal management than the former.