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Accelerated microwave synthesis of magnesium sulfide with the pro-heating medium of graphite

Published online by Cambridge University Press:  03 March 2011

Yan Xu
Affiliation:
Department of Chemistry, Tsinghua University, Beijing, 100084, China
Xiaoyue Xiao*
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
*
a)Author to whom correspondence should be addressed.
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Abstract

Two reaction routes have been tried for the synthesis of magncsium sulfide by applying microwave irradiation. In the first trial, finely ground Mg and S were mixed thoroughly and heated in a microwave oven for various lengths of time (5 + 5 + 8 + 10 and 12 + 12 + 35 + 45 min) in a sealed quartz tube. In the second trial, the pro-heating medium (PHM) of graphite was introduced into the mixture of Mg and S and microwaved for only 1 min. Results of x-ray diffraction analyses of the reaction products indicated that MgS polycrystallites (cubic, a0 = 5.201 ± 0.001) had formed in the second trial, and that the MgS yield was greater than 98%. Data of EDAX and EPMA gave a formula of MgS with atomic ratio of Mg:S = 1.0:1.0. In contrast, MgS could not be identified in the reaction mixtures in the first trial. Obviously, graphite, as a PHM, played a key role in the dramatic enhancement of the rate of the reaction between Mg and S powders. Furthermore, the effect of different molar ratios of graphite to Mg on the rate of microwave synthesis was investigated.

Type
Articles
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1Asano, S. and Yamashita, N., J. Phys. Soe. Jpn. 49 (6), 2231 (1980).CrossRefGoogle Scholar
2Stepanyuk, V. S., Grigorenko, A. A., Katsnelson, A. A., Farberovich, O. V., Szász, A., and Mikhailin, V. V., Phys. Status Solidi (b) 174, 289 (1992).CrossRefGoogle Scholar
3Missous, O., Loup, F., Prevost, H., Fesquet, J., and Gasiot, J., J. Alloys and Compounds 180, 209, (1992).CrossRefGoogle Scholar
4Belsky, A. N., Krachni, O., and Mikhailin, V. V., Phys. Status Solidi (b) 176, 493 (1993).CrossRefGoogle Scholar
5Yamashita, N., Jpn. J. Appl. Phys. 30 (7), 1384 (1991).CrossRefGoogle Scholar
6Yamashita, N., Jpn. J. Appl. Phys. 30 (12A), 3335 (1991).CrossRefGoogle Scholar
7Kim, D. T., Yu, K. S., Kim, W. T., Kim, C. D., and Park, H. L., J. Mater. Sci. Lett. 11, 886 (1992).CrossRefGoogle Scholar
8Charreire, Y., Svoronos, D-R., Ascone, I., Tolonen, O., Niinistö, L., and Leskela, M., J. Electrochem. Soc. 140 (7), 2015 (1993).CrossRefGoogle Scholar
9Nakanishi, Y., Natsume, K., Fukuda, Y., Shimaoka, G., Tatsuoka, H., and Kuwabara, H., J. Cryst. Growth 101, 462 (1990).CrossRefGoogle Scholar
10Haiou, H. and Shuli, W., Solid State Ionics 51, 157 (1992).CrossRefGoogle Scholar
11Wang, L. H., J. Mater. Sci. Lett. 12, 212 (1993).CrossRefGoogle Scholar
12Albin, S., Satira, J. D., Livingston, D. L., and Shull, T. A., Jpn. J. Appl. Phys. 31, 715 (1992).CrossRefGoogle Scholar
13Plichta, E. J. and Behl, W., U. S. Patent 5,035,963 (1991).Google Scholar
14X-Ray Diffraction Files: 8-478 and 35-730 for MgS, 4-770 for Mg, 8-247 for S, and 25-284 for C (graphite).Google Scholar
15Landry, C. C. and Barron, A. R., Science 260, 1653 (1993).CrossRefGoogle Scholar
16Whittaker, A. G. and Mingos, D. P., J. Chem. Soc. Dalton Trans. 1992, 2751 (1992).CrossRefGoogle Scholar
17Mingos, D. M. P. and Baghurst, D. R., Chem. Soc. Rev. 20, 1 (1991).CrossRefGoogle Scholar
18von Hippel, A. R., Dielectric Materials and Applications (MIT Press, 1954).Google Scholar
19Sutton, W. H., Ceram. Bull. 68 (2), 376 (1989).Google Scholar