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Structural disorder induced in graphite by grinding

✍ Scribed by M. Tidjani; Jalil Lachter; T.S. Kabre; R.H. Bragg

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 295 KB
Volume: 24
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(86)90266-6

No coin nor oath required. For personal study only.

✦ Synopsis

Grinding

was performed at room temperature on a natural graphite with a perfectly ordered structure (c = 6.708 ? 0.002 A), using both ceramic and steel ball-mills for periods up to 90 hours. The induced structural transformations were studied by X-ray diffraction. The interlayer spacing dmz was found to increase with grinding time, exhibiting plateaus around 3.375 A and possibly 3.40 A. and a limiting value of 3.434 t 0.013 A was reached in both ball-mills. The mean crystallite size decreased from 3000 A to about 10 A. The changes in d,,,, are attributed to the introduction into the initial pristine graphite structure of interstitial carbon atoms.

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