scholarly journals DIVARENT EQUILIBRIUM IN MULTI-COMPONENT SYSTEMS

2021 ◽  
pp. 59-71
Author(s):  
L. Soliev ◽  
◽  
M.T. Jumaev ◽  
Keyword(s):  
Reciprocal System ◽  
Translation Method ◽  
Component Systems ◽  
Phase Complex

The structure of the phase complex of the six-component reciprocal system Na, K, Mg, Ca || SO4, Cl-H2O at 500C in the region of crystallization of anhydrite (CaSO4) was studied by the translation method, and variants of the formation of divariant fields during the transition of the system from the five-component to the six-component state were shown

scholarly journals PHASE EQUILIBRIA IN SYSTEM K,Са//SO4,HCO3,F-H2O AT 25 °C

2018 ◽  
Vol 61 (3) ◽  
pp. 26
Author(s):  
I. Jabborov ◽  
L. Soliev ◽  
I. Nizomov ◽  
J. Musodzonova
Keyword(s):  
Phase Diagram ◽  
Phase Equilibria ◽  
Reciprocal System ◽  
Component Composition ◽  
Scientific Data ◽  
Translation Method ◽  
Phase Rule ◽  
Component System ◽  
Component Systems ◽  
Phase Complex

The article describes a study on the identification of possible phase equilibria in mutual geometrical images of five-component system of water and salt from sulfates, bicarbonates, potassium and calcium fluoride at 25 °C, followed by the construction of its phase diagram complex. Knowledge of the laws governing the structure of the phase complex of this system is necessary not only to obtain new scientific data as reference material, but also to contribute to the creation of optimal conditions for the utilization of liquid wastes of aluminum industrial production containing the system of salts that make up this system. To solve the problem, we used the translation method, which is based on the position according to which the dimension of the geometric images of the diagram of the original (private) system increases by one by adding a subsequent component, due to its concentration, i.e. are transformed. Since the investigated five-component system consists of five particular four-component systems, the addition of the fifth component to any of them is accompanied by transformations of the geometric images of all five four-component systems. Transformed geometric images according to their topological properties are broadcasted to the level of a five-component composition. At the level of the five-component composition, the transformed geometric images, in accordance with the Gibbs phase rule, intersect each other forming geometric images of a given level of componentness. Investigation of phase equilibria five-component water-salt reciprocal system of sulfates, bicarbonates, potassium and calcium fluorides and construction of its phase diagram with complex translation method (at 0°C) showed that it is characterized by fifteen divariant fields, thirteen monovariant curves, and four invariant points. On the basis of the obtained data, the complete closed phase diagram of the investigated system was constructed for the first time and, for the convenience of its reading, it is fragmented by the regions of divariant equilibria.Forcitation:Jabborov I., Soliev L., Nizomov I., Musodzonova J. Phase equilibria in system K,Са//SO4,HCO3,F-H2O at 25 °C. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 3. P. 26-30 

Phase complex of the Li,K,Ba‖F,Br quaternary reciprocal system

2012 ◽  
Vol 57 (10) ◽  
pp. 1379-1386
Author(s):  
M. A. Istomova ◽  
G. E. Egortsev ◽  
I. K. Garkushin
Keyword(s):  
Reciprocal System ◽  
Phase Complex

scholarly journals Phase complex model of ternary reciprocal system Na+,Sr2+||WO42-,MoO42-

2019 ◽  
Vol 59 (8) ◽  
pp. 103-115
Author(s):  
Alexander V. Burchakov ◽  
Keyword(s):  
Phase Equilibria ◽  
Solid Solutions ◽  
Binary Systems ◽  
Reciprocal System ◽  
Condensed State ◽  
Continuous Series ◽  
Algebraic Equations ◽  
Reaction Products ◽  
System Components ◽  
Phase Complex

The paper presents the results of a theoretical study of the phase complex of a three-component reciprocal system consisting of sodium and strontium tungstates and molybdates. Previously, a literature review was conducted on data on phase equilibria in the condensed state of individual salts, binary faceting systems. In two Na2MoO4 – SrMoO4 and Na2WO4 – SrWO4 binary systems, a eutetic equilibrium is observed with the formation of solid phases corresponding to the system components, and in two other Na2MoO4 – Na2WO4 and SrMoO4 – SrWO4 binary systems, one phase of a continuous series of solid solutions crystallizes. Based on the mathematical model of the molar balance, one can uniquely determine the quantities of reaction products, the molecular formulas of solid solutions, and the equations of chemical reactions for an arbitrary mixture of system components. This model represents a set of algebraic equations by which the balance is calculated. To build a 3D computer model, the paper presents the equations for the conversion of coordinates from barycentric to Cartesian. The model is implemented in concentration-temperature coordinates using the KOMPAS-3D program using experimental data on the system. The model is built in two interpretations: based on data on the faceting elements and on the basis of all available data about the system. Comparison of the two models makes it possible to evaluate the predictive ability carried out using 3D modeling. From this comparison, it was found that using the 3D model it is possible to conduct a preliminary a priori forecast of phase equilibria in order to identify the structure of phase diagrams at the qualitative and quantitative levels. The projection of the crystallization polytherm onto the square of the compositions is represented by two fields of solid solutions – Na2MoxW1-xO4 and SrMoxW1-xO4. Isothermal and polythermal sections were constructed. The system implements di- and monovariant equilibria.

Phase Complex Modeling for the Na+,Sr2+||Cl–,$${\text{WO}}_{{\text{4}}}^{{{\text{2}}-}}$$ Three-Component Reciprocal System

2021 ◽  
Vol 66 (7) ◽  
pp. 1021-1030
Author(s):  
A. V. Burchakov ◽  
I. K. Garkushin ◽  
I. M. Kondratyuk ◽  
E. M. Egorova ◽  
S. N. Milov
Keyword(s):  
Reciprocal System ◽  
Phase Complex

Phase Complex of the Quinary Reciprocal System Li+,Na+,K+||F–,Cl–,Br– and Investigation of the Stable Tetrahedron LiF–NaF–KCl–KBr

2020 ◽  
Vol 65 (7) ◽  
pp. 1040-1046
Author(s):  
I. K. Garkushin ◽  
A. V. Burchakov ◽  
U. A. Emel’yanova ◽  
M. V. Chugunova
Keyword(s):  
Reciprocal System ◽  
Phase Complex

scholarly journals STRUCTURE OF THE PHASE COMPLEX OF THE SYSTEM K,Mg,Ca||SO4,Cl-H2O AT 0°C

2021 ◽  
Vol 73 (1) ◽  
pp. 142-150
Author(s):  
L. Soliev ◽  
◽  
M. T Jumaev ◽  
I. O. Fritskiy ◽  
◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Translation Method ◽  
Phase Complex ◽  
Invariant Points ◽  
Solid Phases

The translation method predicted phase equilibria on geometric images of the system K,Mg,Ca||SO4,Cl-H2O at 00 C. It was found that at 0 °C the studied system is characterized by the presence of 6 invariant points, 18 monovariant curves and 15 divariant fields. Based on the data obtained, a diagram of the phase complex of the K,Mg,Ca||SO4,Cl-H2O at 0°C and fragmented by divariant fields, as well as crystallization fields of individual equilibrium solid phases, was constructed.

Role of boundaries in the crystallization of amorphous films

1988 ◽  
Vol 46 ◽  
pp. 626-627
Author(s):  
D. A. Smith
Keyword(s):  
Low Temperature ◽  
Amorphous State ◽  
Nucleation And Growth ◽  
Amorphous Films ◽  
Island Nucleation ◽  
Surface Steps ◽  
Transmission Electron ◽  
Component Systems ◽  
Temperature Deposition

The nucleation and growth processes which lead to the formation of a thin film are particularly amenable to investigation by transmission electron microscopy either in situ or subsequent to deposition. In situ studies have enabled the observation of island nucleation and growth, together with addition of atoms to surface steps. This paper is concerned with post-deposition crystallization of amorphous alloys. It will be argued that the processes occurring during low temperature deposition of one component systems are related but the evidence is mainly indirect. Amorphous films result when the deposition conditions such as low temperature or the presence of impurities (intentional or unintentional) preclude the atomic mobility necessary for crystallization. Representative examples of this behavior are CVD silicon grown below about 670°C, metalloids, such as antimony deposited at room temperature, binary alloys or compounds such as Cu-Ag or Cr O2, respectively. Elemental metals are not stable in the amorphous state.

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