Effect of Organic Additives on Silicon Combustion in Nitrogen

Authors

  • T. Barinova Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia
  • I. Borovinskaya Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Academician Osipyan str., 8, Chernogolovka, Moscow Region, 142432, Russia http://orcid.org/0000-0002-7318-829X

DOI:

https://doi.org/10.18321/ectj150

Abstract

The work shows some peculiarities of silicon combustion in nitrogen in the presence of additives of organic compounds. Organic compounds with different composition were used. Combustion of samples was carried out in a constant-pressure bomb. The combustion products are composite powders and containing α-, β- Si3N4, SiC, Si2N2O. The addition of organic additives suppressed coagulation of Si particles, improved the extent of conversion, and promoted combustion of coarse Si powders which can’t be ignited by any other methods. Introduction of organic dopants to Si powders was found to intensify their combustion without significant influence on the combustion temperature. Active transition of silicon to the gas phase occurs in the low-temperature zone of the combustion wave at the temperature lower than the melting point of silicon. At the temperatures lower than the melting point of Si the quenched combustion products contain two types of crystals of SiC and Si3N4. SiC is formed within a low-temperature zone of the combustion wave. SiC is formed by fine crystals and large spherical particulates which are formed by a bunch of very thin web-like crystals. SiC and Si3N4 formation provides a protective coating on silicon particles. It prevents coagulation at the temperature increase. The experiments have proved that it is enough to introduce 1-7 M of the organic additive to 1000 M of silicon for the combustion initiation. Meanwhile, adding different inorganic salts, including ammonium chloride, did not promote combustion. After initiation of combustion to continue Si powder must contain additives or organic compounds or addition of carbon black; carbon black is necessary for keeping the combustion on.

References

1. Mukasyan, A.S., Martynenko, V.M., Merzhanov, A.G., Borovinskaya, I.P., and Blinov, M.Yu., Fiz. Goreniya Vzryva 22:43 (1986).

2. Zakorzhevskii, V.V. and Borovinskaya, I.P., Int. J. SHS 9 : 171 (2000).

3. Grachev, V.V., Shatalov, B.N., and Borovinskaya, I.P., Proc. All-Russia Conf. on Combustion and Explosion in Physical Chemistry and Process Engineering of Inorganic Materials, Moscow, 2002, p. 89.

4. Hirao, K., Miamoto, V. and Koizumi, M., J. Am.Ceramic Soc. 69:60 (1986).

5. Barinova, T.V., Borovinskaya, I.P., Int. J. of SHS 18:25 (2009).

6. Barinova, T.V., Borovinskaya, I.P., Int. J. of SHS 18:30 (2009).

7. Maslov, V.M., Borovinskaya, I.P., and Merzhanov, A.G., Fiz. Goreniya Vzryva 14:79 (1978).

8. Сano, I.G., Perez Baelo S., Rodriguez, M.A., de Aza, S., J. of the European Ceram. Soc. 21:291 (2001).

Downloads

Published

2013-05-20

How to Cite

Barinova, T., & Borovinskaya, I. (2013). Effect of Organic Additives on Silicon Combustion in Nitrogen. Eurasian Chemico-Technological Journal, 15(2), 127–131. https://doi.org/10.18321/ectj150

Issue

Vol. 15 No. 2 (2013)

Section

Articles

License

You are free to: Share — copy and redistribute the material in any medium or format. Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Eurasian Chemico-Technological Journal applies a Creative Commons Attribution 4.0 International License to articles and other works we publish.

Subject to the acceptance of the Article for publication in the Eurasian Chemico-Technological Journal, the Author(s) agrees to grant Eurasian Chemico-Technological Journal permission to publish the unpublished and original Article and all associated supplemental material under the Creative Commons Attribution 4.0 International license (CC BY 4.0).

Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.