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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

Thermodynamic Consideration of B-O-C-H System for Boron Carbide (B4C) Powder Synthesis in Thermal Plasma

Zivota G. Kostic
Institute of Nuclear Sciences "Vinca", Department for Thermal Engineering and Energy Research -11001 Belgrade, PO Box 522, Yugoslavia

Predrag Lj. Stefanovic
Institute of Nuclear Sciences "Vinca", Laboratory for Thermal Engineering and Energy, Mike Petrovica-Alasa 12-14, PO Box 522,11001 Belgrade, Yugoslavia

Pavle B. Pavlovic
The VINCA Institute of Nuclear Sciences, Laboratory for Thermal Engineering and Energy, P. O. Box 52211001 Belgrade, Yugoslavia

Dejan B. Cvetinovic
Institute of Nuclear Sciences "Vinca", Laboratory for Thermal Engineering and Energy, Mike Petrovica-Alasa 12-14, PO Box 522,11001 Belgrade, Yugoslavia

Abstract

The results of equilibrium composition and total enthalpy computation in the temperature range of 1000 K to 6000 K and at pressure of 1 bar, for B-O-C-H system, are presented in the paper. These data enable temperature and energy parameters determination and optimization of the process for ultrafine boron carbide powder (B4C) production, by boron oxide (B203) or boric acid (H3BO3) decomposition in an methane or propane-butane thermal plasma, followed by quenching with cold methane or propane-butane gas.