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Solid-phase electrical conductivity: Variable, [6] depending on the nature of the bonding: network solids in which all electrons are used for sigma bonds (e.g. diamond, quartz) are poor conductors, as there are no delocalized electrons. However, network solids with delocalized pi bonds (e.g. graphite) or dopants can exhibit metal-like conductivity.
Among other nanomaterials, graphene, and carbon nanotube-based conductive ink are gaining immense popularity due to their high electrical conductivity and high surface area. [2] Recently, more attention has been paid on using eco-friendly conductive ink using water as a solvent as compared to organic solvents since they are harmful to the ...
Graphite blocks are also used in parts of blast furnace linings [53] where the high thermal conductivity of the graphite is critical to ensuring adequate cooling of the bottom and hearth of the furnace. [54] High-purity monolithics are often used as a continuous furnace lining instead of carbon-magnesite bricks.
Ki-iti Horai, Thermal conductivity of Rock Forming minerals, Journal of Geophysical Research, Volume 76, Issue 5, pages 1278 — 1308, February 10, 1971. Solidity ≡ The ratio of the volume of solid to the bulk volume, or the ratio of bulk density to solid grain density, d B /d G. Robertson, p. 5. Beryllium oxide: 218 [37]-260 [47]-300 [47]
Its thermal conductivity (2,200 W/m•K) is five times greater than the most conductive metal (Ag at 429); 300 times higher than the least conductive metal (Pu at 6.74); and nearly 4,000 times that of water (0.58) and 100,000 times that of air (0.0224). This high thermal conductivity is used by jewelers and gemologists to separate diamonds from ...
Graphite, named by Abraham Gottlob Werner in 1789, from the Greek γράφειν (graphein, "to draw/write", for its use in pencils) is one of the most common allotropes of carbon. Unlike diamond, graphite is an electrical conductor. Thus, it can be used in, for instance, electrical arc lamp electrodes.
Note that the especially high molar values, as for paraffin, gasoline, water and ammonia, result from calculating specific heats in terms of moles of molecules. If specific heat is expressed per mole of atoms for these substances, none of the constant-volume values exceed, to any large extent, the theoretical Dulong–Petit limit of 25 J⋅mol ...
Graphite oxide itself is an insulator, [47] almost a semiconductor, with differential conductivity [11] between 1 and 5×10 −3 S/cm at a bias voltage of 10 V. [47] However, being hydrophilic, graphite oxide disperses readily in water, breaking up into macroscopic flakes, mostly one layer thick.