Download Chemical vapor transport reactions by Michael Binnewies PDF

By Michael Binnewies

This finished guide covers the various points of chemical delivery reactions from uncomplicated study to big useful purposes. The publication starts off with an outline of types for chemical delivery reactions after which proceeds to regard the explicit chemical shipping reactions for the weather, halides, oxides, sulfides, selenides, tellurides, pnictides, between others. features of shipping from intermetallic stages, the soundness of fuel debris, thermodynamic facts, modeling software program and laboratory innovations also are lined. chosen experiments utilizing chemical delivery reactions around out the paintings, making this e-book an invaluable reference for researchers and teachers in good country and inorganic chemistry

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By three unique equilibria the partial pressures of all gas species are determined. 4, others are possible. 4) In principle, both SiI2 and SiI4 can participate in the transport of silicon from the source to the sink. We do, however, not know the extent of their contribution. 32 2 Chemical Vapor Transport – Models We have already introduced in Chapter 1 the solubility λ of a solid in the gas phase. This expression summarizes the partial pressures p(SiI4) and p(SiI2), and allows in a simple way dissolution of a solid in a gas phase.

9). The best transport agent is HgCl2 (1000 % 900 °C): • For the heterogenous transport equilibrium lg K comes to lie close to zero (Kp z 1) (based on the reaction with the stoichiometric number of ZnO being unity). • The temperature dependence of lg K is comparatively large. • Condensation of zinc chloride will not occur. • The temperatures are sufficiently high, to ensure the fast setting of all equilibria at T2 and T1. These predictions have been confirmed by experiments. It is always recommended prior to a CVT experiment to consider the aforementioned points.

Van Arkel, J. H. de Boer, Z. Anorg. Allg. Chem. 1925, 148, 345. A. E. van Arkel, Reine Metalle, Springer, Berlin, 1939. M. Binnewies, Chemie in uns. Zeit 1998, 32, 15. G. Brauer, Handbuch der Präparativen Anorganischen Chemie, Enke, Stuttgart, 1975. R. Bunsen, J. prakt. Chem. 1852, 56, 53. R. Gruehn, R. Glaum, O. Trappe, Computerprogram CVTrans, University of Giessen, 1997. R. Gruehn, R. Glaum, Angew. Chemie 2000, 112, 706. Angew. Chem. Int. Ed. 2000, 39, 692. A. A. F. Holleman, N. Wiberg, Lehrbuch der Anorganischen Chemie, de Gruyter, Berlin, 102.

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