Structural disorder induced in graphite by grinding
1986; Elsevier BV; Volume: 24; Issue: 4 Linguagem: Inglês
10.1016/0008-6223(86)90266-6
ISSN1873-3891
AutoresMohammed E. Tidjani, Jalil Lachter, Tibo Siméon Kabre, Robert H. Bragg,
Tópico(s)Advanced Materials Characterization Techniques
ResumoGrinding 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 d002 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 ± 0.013 A was reached in both ball-mills. The mean crystallite size decreased from 3000 A to about 10 A. The changes in d002 are attributed to the introduction into the initial pristine graphite structure of interstitial carbon atoms.
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