ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

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Preparation of tungsten carbide by decomposition of  W(CO)6 I. Thermodynamic calculations in the system  W-C-O

Ľ. Komorová and J. Jalůvka

Department of Chemistry, Technical University, 043 85 Košice


Abstract:  The paper deals with the thermodynamic calculations in the ternary system W—С — О at 600, 800, and 1000 K, with the aim to find the stability regions of the phases which can be present. The calculation of stability regions of the phases diagramatically represented in the plots with log pco — log pco2 coordinates made it possible to choose the experimental conditions of the dedecomposition of tungsten carbonyl so that the required final product is obtained. From the thermodynamic point of view the conditions of preparation of non-stoichiometric tungsten carbide with catalytic activity for oxidation of hydrogen are discussed in detail.

Full paper in Portable Document Format: 295a615.pdf


Chemical Papers 29 (5) 615–619 (1975)

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