Artificial graphite

Fig. 3.Z3 Adsorption isotherm of n-butane at 273 K on a sample of artificial graphite ball-milled for 192 b. The shoulder F appeared at a relative pressure which was the same for all six samples in the first milling run, all six in the second milling run, and also for two of the milled samples which had been compacted. The milling time varied between 0 and 1024 h, and the BET-nilrogen areas of the surfaces between 9 and 610 m g ...

CARBON - CARBON AND ARTIFICIAL GRAPHITE - APPLICATIONS OF BAKED AND GRAPHITIZED CARBON] (Vol 4) Calcium carbimide [156-62-7]... 

See Carbon, CARBON AND ARTIFICIAL GRAPHITE Carbon, NATURAL GRAPHITE. 

Structure, Terminology, and History" under "Carbon (Carbon and Artificial Graphite)" ia ECT3rd ed., Vol. 4, pp. 556—560, byj. C. Long, Union Carbide Corp. 

Fig. 1. With-grain mechanical properties of artificial graphite (1). To convert MPa to psi, multiply by 145.

Glassy, or vitreous, carbon is a black, shiny, dense, brittle material with a vitreous or glasslike appearance (10,11). It is produced by the controUed pyrolysis of thermosetting resins phenol—formaldehyde and polyurethanes are among the most common precursors. Unlike conventional artificial graphites, glassy carbon has no filler material. The Hquid resin itself becomes the binder. 

Baked and Graphitized Products, Uses" under "Carbon" in ECT2nd ed., VoL 4, pp. 202—243, by W. M. Gaylord, Union Carbide Corp. "Other Forms of Carbon and Graphite Carbon" under "Carbon (Carbon and Artificial Graphite)" in ECT 3rd ed., Vol. 4, pp. 628—631, by R. M. Bushong, Union Carbide Corp. 

Artificial graphite has been ground in ball mills in closed circuit with air classifiers. For lubricants the graphite is ground wet in a paste in which water is eventually replaced by oil. The colloid mih is used for production of graphite paint. 

Industrial carbon anodes and artificial graphites are not a single material but are rather members of a broad family of essentially pure carbon. Fortunately, artificial graphites can be tailored to vary widely in their strength, density, conductivity, pore structure, and crystalline development. These attributes contribute to their widespread applicability. Specific characteristics are imparted to the fmished product by conti ollmg the selection of precursor materials and the method of processing [19]... 

Artificial graphite was first manufactured on a large scale by A. G. Acheson in 1896. In this process coke is heated with silica at 2500°C for 25-35 h ... 

In the USA artificial graphite is now made on a scale exceeding 300 kilotonnes pa (1989), and is used mainly for electrodes, crucibles and vessels, and various unmachined shapes specialist uses include motor brushes and contacts and refractories of various sorts. 

The crystallinity of artificial graphite can generally be controlled by the heat-treatment temperature, but it is lower than that of natural graphite. The Lc of artificial graphite is less than 1000 A and the d value is more than 3.36 A. 

Materials Performance Natural graphite Artificial graphite Hard carbons... 

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