Thermal conductivity and electrical resistivity of poco grade AXF-Q1 graphite to 3300° K

✍ Scribed by S.G. Bapat; H. Nickel

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 367 KB
• Volume: 11
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(73)90073-0

✦ Synopsis

Thermal conductivity and electrical resistivity of Poco Grade AXF-Ql Graphite are presented from 110 to 3300 "K. The temperature range was covered by two steady state techniques: (a) a comparative rod apparatus and (b) a radial inflow apparatus. Above 500°K the thermal conductivity data are represented quite well by a 7-l type function, that is characteristic of Umklapp scattering processes which give rise to the thermal resistivity. We have further shown that the lattice conduction accounts for about 80 per cent of the heat transport even at 3300 "K. For more highly graphitized graphite and other cokes, the results can be different. Our results are at variance with some literature that indicate a 'strongly' decreasing thermal conductivity above 3000°K or a 'constant' thermal conductivity with a 'strong' electronic conduction at up to 3300 "K.