Abstract
ACCORDING to L. Wöhler and O. Balz1,2, the oxides WO3, W2O5 (W4O11) and WO2 volatilize considerably above 800–900° C., and the vapour pressure of tungsten trioxide is, according to O. Ruff and Grieger3,2, 0·206 mm. at 1,023° C. It is generally believed that this phenomenon explains the formation of much larger metal grains during the reduction of tungsten trioxide in hydrogen at 800–900° C. from much finer oxide grains.
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References
Wöhler, L., and Balz, O., Z. Elektrochem., 27, 415 (1921).
Gmelin, "Handbuch", 53, 113, 116, 122.
Ruff, O., and Grieger, "Landolt-Börnstein Tab.", V. Supp. II, 2, 1301.
van Liempt, J. A. M., Z. anorg. allg. Chem., 120, 267 (1922).
Bräkken, H., Z. Kris., A, 78 487 (1931).
Magneli, Arne, Arkiv. Kemi. Mineral. Geol., 24, A, No. 2, 11 (1946).
Keggin, J. F., Proc. Roy. Soc., A, 144, 75 (1934).
Nieuvenburg, C. J. v., and Blumendal, H. B., Rec. Trav. Chim., 50, 994 (1931).
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MILLNER, T., NEUGEBAUER, J. Volatility of the Oxides of Tungsten and Molybdenum in the Presence of Water Vapour. Nature 163, 601–602 (1949). https://doi.org/10.1038/163601b0
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DOI: https://doi.org/10.1038/163601b0
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