Citation: XU Zi-Jie, JI Tao, WANG Wei-Yan, XIA Bing-Zhong, MA Chao, GAN Li-Hua. Phase Transformation of Pyrocarbon in Molten Sodium Metal[J]. Acta Physico-Chimica Sinica, ;2011, 27(01): 262-266. doi: 10.3866/PKU.WHXB20101227 shu

Phase Transformation of Pyrocarbon in Molten Sodium Metal

1.
Department of Chemistry, Tongji University, Shanghai 200092, P. R. China

Received Date: 9 August 2010
Available Online: 15 November 2010

Amethod to graphitize amorphous carbon was carried out by annealing pyrocarbon from cracked phenolic resin in molten sodium metal at a lower temperature and ambient pressure and the phase transformation of pyrocarbon from amorphous carbon to crystallized carbon was studied. X-ray diffraction (XRD), Raman scattering spectroscopy, transmission electron microscopy (TEM), and nitrogen gas physisorption by the Brunauer-Emmett-Teller (BET) method were used to probe the prepared samples for carbon composition, particle size, and morphology. The graphitization of amorphous carbon was obvious when being annealed in molten sodium metal in ar n atmosphere at 800 °C for 24 h. For the sample annealed at 900 °C for 24 h, the degree of graphitization was 40%and the average thickness of the graphitized carbon layers was about 40 nm. The effect of sodium metal infiltration into the matrix of amorphous carbon on the graphitization is also discussed.
- Phenol resin,
- Pyrocarbon,
- Graphitization,
- Sodium metal,
- Phase transformation
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沈阳化工大学材料科学与工程学院沈阳 110142