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Chemischer Transport ternärer Oxide im System Ni/Mo/O – Experimente und Modellrechnungen
Author(s) -
Steiner Udo,
Reichelt Werner
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500527
Subject(s) - ternary operation , non blocking i/o , materials science , oxide , thermodynamics , transport phenomena , chemistry , mineralogy , metallurgy , physics , organic chemistry , computer science , programming language , catalysis
Abstract Chemical Vapour Transport of Ternary Oxides in the System Ni/Mo/O – Experiments and Model Calculations The chemical vapour transport behaviour of the phases in the Ni/Mo/O system has been investigated using Cl 2 and Br 2 as transport agents in a temperature gradient 1173 to 1073 K. Single crystals of Ni 2 Mo 3 O 8 , NiO and MoO 2 have been obtained, while the deposited NiMoO 4 crystals are destroyed during cooling down to room temperature due to a phase transition. Pure powders of the ternary compounds have been used as starting materials as well as mixtures of three coexisting phases. The observed transport behaviour is compared with results of thermo dynamical model calculations. The influences of source composition, transport agent and the moisture contents are described in detail.