Abstract
Mesocarbon microbeads are now-a-days used as a prominent self-sintering precursor for the production of high density monolithic graphite. The quality of this graphite is highly dependent on the characteristics of these microbeads, such as the quinoline and toluene insoluble contents, β-resins content and volatile matter content, which in turn, can be controlled to desired values by suitable treatments of their extraction and calcination. In the present paper, the authors give an account of the study conducted to see the effect of calcination conditions of mesocarbon microbeads on the characteristics of the resulting graphite. A calcination at a temperature in the range of 280–320 °C for 30 min. under an ambient pressure of nitrogen, or at a temperature of 245–310 °C for 10 min. under a reduced pressure (5 cm Hg) of nitrogen, results in mesocarbon microbeads having a quinoline insoluble content of 83.6–89.8%, toluene insoluble content of 94.4–99.7%, β-resins content of 6.8–11.9% and a volatile matter content of 10.2–13.5%. Such microbeads have been found to lead to a monolithic graphite possessing a bulk density 1.91–2.02 g cm−3, bending strength of 62–70 MPa, Shore hardness of 58–69, electrical resistivity of 2.1–2.6 mΩ cm and a degree of anisotropy of 1.02–1.05.
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References
H. HONDA and Y. YAMADA, J. Jpn. Petrol. Inst. 16 (1973) 392.
Idem., "Ceramic Data Book" (Kogyoseihin Gijutsu Kyokai, Tokyo, 1973) p. 337.
A. OYA, in Proceedings of the Indo-Japanese Workshop on Pitch and Pitch-Based Products, edited by O. P. Bahl and L. M. Manocha (India Carbon Society, NPL, New Delhi, 1989) p. 58.
G. BHATIA, R. K. AGGARWAL and O. P. BAHL, ibid., p. 22.
Y. NAKAGAWA, K. FUJITA and M. MORI, in Proceedings of the 17th Biennial Conference on Carbon, American Carbon Society, Kentucky, 1985, p. 409.
N. FUKUDA, M. HONMA and K. NAGAYAMA, in Proceedings of the International Conference on Carbon, edited by B. McEnaney and T. J. Mays (Institute of Physics, NewCastle-upon, Tyne, UK 1988), p. 620.
C. MORRIS and H. MARSH in Proceedings of the 19th Biennial Conference on Carbon, American Carbon Society, Pennsylvania 1989, p. 142.
K. NAGAYAMA, T. TORII, H. HATANA and N. FUKUDA, in Extended Abstacts-20th Biennial Conference on Carbon, American Carbon Society, California, 1991, p. 206.
R. WOLF, R. SPERLING and W. HUETTNER, in Proc. 5th Int. Conf. Carbon, (German Carbon Group) Essen, Germany, June 22-26, 1992, p. 964.
G. BHATIA, R. K. AGGARWAL, N. PUNJABI and O. P. BAHL, in Proceedings of the NationalWorkshop on Newer Carbon Products and Their Applications, edited by O. P. Bahl, G. Bhatia, R. B. Mathur and R. K. Aggarwal (Indian Carbon Society, New Delhi, 1992) p. 398.
Idem., in Extended Abstracts and Program-21st Bienniel Carbon Conference, Buffalo, USA, June 13-18, 1993 (American Carbon Society, New York, 1993) p. 719.
Idem., in Proceeding of the National Conference on Carbon 94, edited by O. P. Bahl (Indian Carbon Society, NPL, NewDelhi, 1994) p. 186.
Idem., J. Mater. Sci. 29 (1994) 4757.
Idem., ibid. 32 (1997) 135.
N. PUNJABI, Ph.D. thesis, Birla Institute of Technology & Science, Pilani, Rajasthan, India, 1998.
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Aggarwal, R.K., Bhatia, G., Bahl, O.P. et al. Effect of calcination conditions of self-sintering mesocarbon microbeads on the characteristics of resulting graphite. Journal of Materials Science 35, 5437–5442 (2000). https://doi.org/10.1023/A:1004871601753
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DOI: https://doi.org/10.1023/A:1004871601753