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Thermal conductivity and permeability of consolidated expanded natural graphite treated with sulphuric acid
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Wang, L.W., Metcalf, Steven J., Critoph, Robert E., Thorpe, R. and Tamainot-Telto, Z. (2011) Thermal conductivity and permeability of consolidated expanded natural graphite treated with sulphuric acid. Carbon, Vol.49 (No.14). pp. 4812-4819. doi:10.1016/j.carbon.2011.06.093
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Official URL: http://dx.doi.org/10.1016/j.carbon.2011.06.093
Abstract
The thermal conductivity and permeability of consolidated expanded natural graphite treated with sulphuric acid (ENG-TSA) were measured both parallel and perpendicular to the direction of compression used to produce the samples. Results showed that the thermal conductivity and permeability were highly anisotropic. The thermal conductivity perpendicular to the direction of compression was 50 times higher than that parallel to the direction of compression and the permeability was 200 times higher. The maximum thermal conductivity measured was 337 W m(-1)K(-1) at a bulk density of 831 kg m(-3). The permeability perpendicular to the direction of compression varied in the range of 10(-11) to 10(-16) m(2) as the density increased from 111 to 539 kg m(-3). The specific heat was measured, and the average value is 0.89 kJ kg(-1) K(-1) in the temperature range 30-150 degrees C. As a type of heat transfer matrix the thermal diffusivity was about five times higher than that of, for example, pure aluminium due to the combination of improved thermal conductivity with comparatively low density and reasonable specific heat. (C) 2011 Elsevier Ltd. All rights reserved.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Carbon | ||||
| Publisher: | Pergamon | ||||
| ISSN: | 00086223 | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Volume: | Vol.49 | ||||
| Number: | No.14 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 4812-4819 | ||||
| DOI: | 10.1016/j.carbon.2011.06.093 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Royal Society , AWM Science City Energy Efficiency Project , Natural Science Foundation of China, National 100 Outstanding PhD thesis Foundation in China | ||||
| Grant number: | 50736004, 50806043 (Natural Science Foundation of China) |
Data sourced from Thomson Reuters' Web of Knowledge
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