133. Thermal conductivity and total emittance of ZT-type graphite in the temperature range 1000–2000°C
✍ Scribed by M. Hoch; C.K. Jun
- Publisher
- Elsevier Science
- Year
- 1965
- Tongue
- English
- Weight
- 105 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
✦ Synopsis
Measurements of thermal conductivity and electrical resistivity have been undertaken over the temperature range 20"-200°C for a series of compacted graphite powder matrices and a further series of matrix materials mixed with different volumes of coated uranium carbide particles. The temperature range has been extended to 1000°C for particular samples. Results are presented and discussed to indicate that the manufacturing process produces homogeneous materials whose measured transport properties are affected markedly by variations of several parameters including the initial compacting pressure, the volume of added particles and the amount of pyrolytic carbon deposited in the pores. Large increases in both physical properties are obtained at the lower temperatures for changes in each of these parameters. In the case of the pressure variable the thermal conductivity is found to change linearly with increase of pressure over the range 6-1000 psi. At higher temperatures the differences are much reduced and the materials behave in a manner consistent with that shown by other carbons and graphites having similar properties at the lower temperatures.