Since the above conditions are satisfied, the liquid state can be considered an equilibrium mixture of five kinds of species : Te, Bi, Sb, Bi2Te3, Sb2Te3 in the system TeBiSb, and Te, Sn, Pb, SnTe, PbTe in the system TeSnPb, respectively, and the solid state can be regarded as an equilibrium mixture of two kinds of species : Bi2Te3, Sb2Te3 in the system TeBiSb, and SnTe, PbTe in the system TeSnPb, respectively.
#PLAGIOCLASE TERNARY DIAGRAM SERIES#
These conditions are as follows : of solubility in the binary systems TeA~(Te Bi, TeSb) and TeAIV(TeSn, TePb), and complete solubility in the binary systems BiSb and Sn Pb, pseudobinary systems formed by the stoichiometric compounds Bi2Te3Sb2Te3 and SnTePbTe exhibit complete miscibility in both liquid and solid states, and form a continuous series of solid solutions satisfying Vegard s law, while the liquidus and solidus curves follow a monotonic course and are situated at a short distance from each other. Both systems, TeBiSb and TeSnPb, satisfy the conditions for application of the theory of regular associated solutions to calculation of the equilibrium diagram. Both systems exhibit a continuous change in the composition of the pseudobinary compound (BixSb1x)2 Te3 and (SnxPb1x)Te, which is associated with a continuous change in electronic properties. rity in the shape of the equilibrium curves in the partial binary systems (TeBi, TeSb, BiSb and TeSn, TePb, SnPb, respectively ), and in the pseudobinary systems formed by the stoichiometric compounds (Bi2Te3Sb2Te3 and SnTePbTe, respectively). There is a simila (*) Institute of Industrial Chemistry, Rydygiera 8,01793 Warszawa, Poland. aim of the present study was to calculate the equilibrium diagram for the TeBiSb system which is homologous to the system TeSnPb. Recently, the methods has been applied also to many ternary systems. In this manner equilibrium diagrams have been determined for a number of binary systems. Consequently, these methods are utilized also for systems which have not been experimentally studied. However, in the case of some types of systems, the application of wellfounded assumptions and simplifications affords results consistent with the experimental ones. There is no general calculation method being common for various systems. This can be achieved either by means of time and laborconsuming measurements which permit plotting the equilibrium diagram, or more frequently means of theoretical calculations of equilibrium curves on the basis of the thermodynamics of nonideal solutions. Since different techniques for growing alloy crystals have already been developed, it is now of interest to determine the dependence of the concentration on temperature. Control of the composition of the alloy permits gaining control of its electronic properties. They show the interesting property of the dependence of the energy gap on alloy composition, which has been intensively investigated for the TeSn Pb system. systems, among which tellurium alloys represent the most numerous group, are increasingly often employed, mainly in electronics, both in the crystalline and noncrystalline states. the basis of the theory of regular associated solutions the equilibrium phase diagram of the ternary system TeBiSb was calculated by Laugier s method. calcule le diagramme de l équilibre liquidesolide dans le système ternaire TeBi Sb par une théorie de solution régulière associée, utilisée par Laugier Abstract. MATYJA Institute of Materials Science and Engineering, Warsaw Technical University Narbutta 85, Warszawa, Poland (Reçu le 9 octobre 1975, révisé le 23 avril 1976, accepté le 25 août 1976) 2014 Résumé.
#PLAGIOCLASE TERNARY DIAGRAM ARCHIVE#
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