Formation of Gas Phase Boron and Carbon-Containing Molecular Species at High Temperatures


Article Preview

The formation of gas phase boron and carbon containing molecular species at high temperatures (thermal plasma) is investigated theoretically, by computing the equilibrium composition of the gas mixture containing boron, carbon, hydrogen and argon. The calculations are performed for the temperature range between 500 and 6000 K, B/C=1 and 2 and for the total pressure in the system of 1 bar. Use is made of the fact that the thermal plasma is plasma in local thermodynamic equilibrium, which makes possible theoretical determination (by employing the Gibbs free energy data for the compounds present in the system) of its equilibrium composition. From the calculated compositions of the investigated gas systems, presented in this paper, it was concluded that the initial molecule for cluster formation, as a connection between individual molecules and the solid state, in the case of the synthesis of solid boron carbide by means of thermal plasma should be the B2C molecule.



Edited by:

Dragan P. Uskoković, Slobodan K. Milonjić and Dejan I. Raković




J. Radić-Perić "Formation of Gas Phase Boron and Carbon-Containing Molecular Species at High Temperatures", Materials Science Forum, Vol. 555, pp. 171-176, 2007

Online since:

September 2007





[1] J. Heberlein: Pure Appl. Chem. Vol. 74 (2002), p.327.

[2] Ž.G. Kostić, P. Lj. Stefanović and P.B. Pavlović: Proc. 10th International Symp. on Plasma Chemistry, Bochum, Germany Vol. 1 (1991) 1. 4-20.

[3] J. Radić-Perić and N. Pantelić: J. Therm. Anal. Cal. Vol. 72 (2003), p.35.

[4] O. Conde and A.J. Silvestre: App. Phys. A Vol. 79 (2004), p.489.

[5] H. Kunzli, P. Gantenbein, R. Steiner and P. Oelhafen: J. Nucl. Mat. Vol. 196-198 (1992), p.622.

[6] P. Fauchais and E. Bourdin: J. Phys. Colloq. Vol., 38 (1977), p. C3-111.

[7] A.L. Suris: Termodinamika visokotemperaturnih processov (Spravočnik, MoskvaMetalurgija 1985).

[8] W.B. White, S.M. Johnson and S.B. Dantzig: J. Chem. Phys. Vol. 28 (1958), p.751.

[9] J. Radić-Perić and M. Perić: Spectrochim. Acta Vol. 35B (1980), p.297.

[10] JANAF Thermodynamical Tables, Nat. Stand. Ref. Data Ser., US Nat. Bur. Stand. Vol. 37 (1971), p.3; NIST-JANAF Thermochemical Tables, Journal of Physical and Chemical Reference Data, fourth ed. Malcolm W. Chase, Jr. (1999).

DOI: 10.1063/1.555994

[11] J.L.M. Martin, P.R. Taylor, J.T. Yustein, T.R. Burkholder and L. Andrews: J. Chem. Phys. Vol. 99 (1993), p.12.

[12] J.L.M. Martin and P.R. Taylor: J. Chem. Phys. Vol. 100 (1994), p.9002.

[13] S. Becker and H.J. Dietze: Int. J. Mass Spetrosc. Ion. Proc. Vol. 82 (1988), p.287.

[14] F. Mauri, N. Vast and C.J. Pickard: Phys. Rev. Lett. Vol. 87 (2001), p.85506.

[15] R. Lazzari, N. Vast, J.M. Besson, S. Baroni and A. Dal Corso: Phys. Rev. Lett. Vol. 83 (1999), p.3230.

DOI: 10.1103/physrevlett.83.3230

Fetching data from Crossref.
This may take some time to load.