Applying the theories for resistivity of the amorphous and granular materials, the temperature dependence of the electrical resistivity of coals, heat treated at different temperatures, has been successfully explained in terms of structural parameters obtained by X-ray measurements.
Diamagnetism of carbon fibers
โ Scribed by C.P. Scott; D.B. Fischbach
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 109 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0008-6223
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โฆ Synopsis
Graphite crystals with thickness ranging from about 100 to 1500 ,A and were prepared b) cleavage. From measurement of the magnetoresistance and the Hall coefficient the electronic properties were determined by the McClui-e's method. The total carrier density does not change much with thickness. with n,. exceeding IL,,, while pLr, ph and p,,/~~ decreases with decreasing thickness.
EPR between 4~2ยฐK and 300ยฐK of a carbon black family: P33
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AASTRACTS 331 ment. The electron microscope (both in the scanning and transmission modes) was used to examine the topography of both wet (60% HNOs, 118ยฐC) and dry oxidized (air, 700ยฐC) fibers as well as fracture surfaces of composites made with treated and untreated fibers. The flexural strength of