Results 221 to 230 of about 47,375 (263)

Electrical Conductivities of Natural Graphite Crystals

Physical Review, 1954
The principal electrical conductivities (${\ensuremath{\sigma}}_{a}$ in the basal plane and ${\ensuremath{\sigma}}_{c}$ perpendicular to the basal plane) of graphite crystals isolated from several North American marbles were studied. By means of measurements of potential distributions on the surfaces of crystals carrying electric current, it was ...
W. Primak, L. H. Fuchs
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Natural-graphite-sheet based heat sinks

2017 33rd Thermal Measurement, Modeling & Management Symposium (SEMI-THERM), 2017
Novel staggered plate fin heat sinks made of natural graphite sheets are presented and their performance is demonstrated via a direct comparison with aluminum. Measurements in a simple wind tunnel with a diode acting as a heat source show that the junction-to-ambient thermal resistance of the graphite heat sink is 31% lower when no electrically ...
Martin Cermak, John Kenna, Majid Bahrami
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Graphene Synthesis from Natural Flake Graphite

2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP), 2018
Graphene is a two-dimensional allotropic modification of carbon formed by a layer of carbon atoms of one atom thick. Graphene was discovered in 2004 by Novoselov and Geim. Article describes some key points of an effective and inexpensive technology for the production of graphene by a chemical-thermo-mechanical method.
E. Strativnov, A. Kozhan, Y. Ivachkin, A. Pazeev   +3 more
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Raman spectra of ground natural graphite

Carbon, 1978
Abstract Structural changes in Ceylon natural graphite with grinding were studied by Raman spectroscopy along with X-ray diffraction. The natural graphite shows a single Raman band at 1580 cm−1, but the ground graphite samples exhibit two Raman bands at 1360 and 1620 cm−1 in addition to the 1580 cm−1 graphite band.
M. Nakamizo, H. Honda, M. Inagaki
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Oxidation Studies of Some Natural Graphites

Journal of the American Ceramic Society, 1955
The rates of oxidation at 900°C. were determined for twenty natural flake and amorphous graphites from eight foreign and three domestic deposits. Methods of determining moisture, volatile matter, ash, and graphitic carbon in such graphites are described.
R. A. HEINDL, N. F. MOHLER
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Superconductivity and magnetism in tantalum–graphite multilayers based on natural graphite

Solid State Communications, 2001
Abstract DC magnetization and AC magnetic susceptibility of Ta–graphite (Ta–G) based on natural graphite (NG) have been measured using a SQUID magnetometer. In this system, Ta multilayers sandwiched between adjacent graphite layers would be periodically stacked along the c axis.
Itsuko S Suzuki, Masatsugu Suzuki, Jürgen Walter   +2 more
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Graphite microcrystals growth in naturally graphitized coal from Hunan, China

Journal of Crystal Growth, 2022
Kuo Li, Hao Zhang, Yuntong Wu, Mianshu Hu, Qinfu Liu   +4 more
openaire   +1 more source

Revisiting the Roles of Natural Graphite in Ongoing Lithium‐Ion Batteries

Advanced Materials, 2022
Zhijie Wang, Wei Lv, Yan-Bing He
exaly  

Graphite as anode materials: Fundamental mechanism, recent progress and advances

Energy Storage Materials, 2021
Li Wang, Xiangming He
exaly  

254. Comparison between progressive graphitization and phase-change graphitization (natural graphite formation)

Carbon, 1982
M. Bonijoly, M. Oberlin, A. Oberlin
openaire   +1 more source