Structural Evolution of Natural Flake Graphite with Different Particle Sizes during the Intercalation and Exfoliation Processes

Xue Qing Yue; Yan Lu; Dong Hua Lu

doi:10.4028/www.scientific.net/AMM.80-81.221

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 80-81Structural Evolution of Natural Flake Graphite...

Structural Evolution of Natural Flake Graphite with Different Particle Sizes during the Intercalation and Exfoliation Processes

Abstract:

In order to investigate the structural evolution of natural flake graphite with different particle sizes during the intercalation and exfoliation process, we used three natural graphites, 35, 50 and 80 mesh, as the raw material and investigated the characteristics of the three chemically prepared graphite intercalation compounds (GICs) of H₂SO₄ and the three corresponding residue GICs (RGICs). Expanded graphites (EGs) were prepared by rapidly heating the RGICs to 1000 °C in a muffle. The Results show that with decreasing the raw graphite particle size, the oxidizing reaction degree of GIC increases, but the intercalating reaction degree decreases. For RGICs, the relative ratio of RGIC phase in a sample decreases with decreasing the raw material particle size. In addition, decreasing the raw graphite particle size decreases the expanded volume of EG.

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Periodical:

Applied Mechanics and Materials (Volumes 80-81)

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221-224

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https://doi.org/10.4028/www.scientific.net/AMM.80-81.221

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July 2011

Authors:

Xue Qing Yue, Yan Lu, Dong Hua Lu

Keywords:

Exfoliation, Graphite, Intercalation

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