Phase separation and nucleation in mixtures of particles with different temperatures

In this work we discussed the modeling of the demixing curve in the liquid state in the Lead – Zinc binary system. We are interested to recalculate the free energies relating on Pb-Zn alloys for several temperatures based on the thermodynamic data collected in the bibliography. This calculation allows us to trace the curve of phase separation from a program after obtaining the mole fractions corresponding to the common tangent to the curve of the free energy with two minima at different temperatures. To do this, we used the Matlab 7.1 as the programming language and the Redlich-Kister polynomial as a mathematical model of development. The results obtained are very satisfactory by comparing them with those of the bibliography.

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Strain Enhanced High Strength Cu–Ag–Zr Conductors

Materials Science Forum ◽

10.4028/www.scientific.net/msf.633-634.707 ◽

2009 ◽

Vol 633-634 ◽

pp. 707-715 ◽

Cited By ~ 1

Author(s):

Julia Lyubimova ◽

Jens Freudenberger ◽

Alexandere Gaganov ◽

Hansjörg Klauss ◽

Ludwig Schultz

Keyword(s):

Heat Treatment ◽

Solid Solution ◽

Phase Separation ◽

Grain Growth ◽

High Strength ◽

Homogeneous Material ◽

Growth Processes ◽

Heat Treated ◽

Different Temperatures ◽

Zr Alloys

Recovery, recrystallisation and grain growth processes as well as the formation of a solid solution and the phase separation of a homogeneous material into a heterogeneous one are observed for Cu-Ag-Zr alloys heat-treated at different temperatures by means of mechanical, electrical and microstructural analyses. Heat treatments are shown to be an effective tool to enhance the strain to failure. If applied between several deformation steps the heat treatment causes an increase of both strain and strength limits.

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Component distribution associated with phase separation and purification of tropical almond biodiesel at different temperatures

Renewable Energy ◽

10.1016/j.renene.2020.10.117 ◽

2021 ◽

Vol 165 ◽

pp. 67-76

Author(s):

K.K. Adama ◽

E.O. Aluyor ◽

Audu T.O. K

Keyword(s):

Phase Separation ◽

Separation And Purification ◽

Component Distribution ◽

Different Temperatures

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Phase separation in aqueous two-phase systems containing poly(ethylene glycol) and magnesium sulphate at different temperatures

The Journal of Chemical Thermodynamics ◽

10.1016/j.jct.2007.11.012 ◽

2008 ◽

Vol 40 (4) ◽

pp. 573-579 ◽

Cited By ~ 9

Author(s):

H. Rasa ◽

M. Mohsen-Nia ◽

H. Modarress

Keyword(s):

Phase Separation ◽

Ethylene Glycol ◽

Magnesium Sulphate ◽

Poly Ethylene Glycol ◽

Two Phase ◽

Different Temperatures ◽

Aqueous Two Phase Systems ◽

Phase Systems ◽

Poly Ethylene

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Liquid-Liquid Phase Separation and Phase Diagrams of Simulated Fernald Waste Glasses

MRS Proceedings ◽

10.1557/proc-333-481 ◽

1993 ◽

Vol 333 ◽

Author(s):

E. Wang ◽

F. Perez-Cardenas ◽

H. Kuang ◽

A.C. Buechele

Keyword(s):

Electron Microscope ◽

Phase Separation ◽

Heat Treating ◽

Liquidus Curve ◽

Miscibility Gap ◽

Transmission Electron ◽

Heat Treated ◽

The Matrix ◽

Different Temperatures ◽

Liquid Liquid Phase Separation

ABSTRACTPrevious study of crystallization behavior in heat-treated Fernald waste glasses has produced an extensive data base of crystal phases likely to appear in various composition ranges and their corresponding liquidus temperatures. In addition, we have frequently observed amorphous phase separation in these glasses and, occasionally, evidence of crystallization originating from such phase separation. These glasses contain more than 10 components. The composition ranges for the major components are: MgF2 10–26 wt%; CaO 4–27 wt%; Al2O3 3–15 wt%; SiO2 25–40 wt%. The morphology of the phase separation as observed in the Scanning Electron Microscope (SEM) is dark, spherical globules dispersed in a continuous matrix. Globules are depleted in Mg, Ca and F, and enriched in Al and Si compared to the matrix. Phase separation occurs more frequently in melts relatively higher in Si and F. A more systematic study on a simplified and simulated seven component system (Al2O3, B2O3, CaO, Fe2O3, SiO2, Na2O and MgF2) has been undertaken to determine the subliquidus miscibility gap and liquidus curve data. Glasses were formulated by varying the concentrations of MgF2, CaO, Al2O3 and SiO2 within the ranges specified above at fixed levels of Fe2O3, B2O3 and Na2O. The miscibility gap and liquidus curve were obtained by heat-treating the glass samples at different temperatures and observing any phase separation and crystallization in the SEM and the Transmission Electron Microscope (TEM). We report here the results of this study to enhance the understanding of the thermodynamic properties of multi-component silicate systems which are usually the basis of nuclear waste glasses.

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Phase Separation in the Ternary Liquid System [Nd(NO3)3(TBP)3]-[UO2(NO3)2(TBP)2]-Tetradecane at Different Temperatures

Radiochemistry ◽

10.1007/s11137-005-0067-9 ◽

2005 ◽

Vol 47 (2) ◽

pp. 173-176

Author(s):

A. K. Pyartman ◽

V. A. Keskinov ◽

N. E. Mishina ◽

A. V. Kudrova

Keyword(s):

Phase Separation ◽

Liquid System ◽

Different Temperatures

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The solution-gel phase transition in aqueous solutions of agarose

Modern Physics Letters B ◽

10.1142/s0217984921501475 ◽

2021 ◽

pp. 2150147

Author(s):

A. H. Asadova ◽

E. A. Masimov

Keyword(s):

Phase Transition ◽

Phase Separation ◽

Aqueous Solutions ◽

Thermal Hysteresis ◽

Gelation Temperature ◽

Gelation Process ◽

Different Temperatures ◽

Gel Phase ◽

Polymer Solvent

Thermal hysteresis and stability of agarose–water gelling systems were studied by the spectrophotometer for different concentrations at different temperatures. Gelation temperature depends on the concentration of agarose. With the increase in the concentration of agarose gelation temperature, strength of agarose increases too. With the increase in the concentration of polymer solvent–gel phase transition, gel melting happens at higher temperatures. The price of enthalpy was determined (150.0127 KC/mol). In gelation process, the phase separation is completed and in this process, the value of this [Formula: see text] equally increases.

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Decreased domain size of p-DTS(FBTTh2)2/P(NDI2OD-T2) blend films due to their different solution aggregation behavior at different temperatures

Physical Chemistry Chemical Physics ◽

10.1039/c7cp07084e ◽

2017 ◽

Vol 19 (48) ◽

pp. 32373-32380

Author(s):

Ke Zhou ◽

Qiaoqiao Zhao ◽

Rui Zhang ◽

Xinxiu Cao ◽

Xinhong Yu ◽

...

Keyword(s):

Phase Separation ◽

Domain Size ◽

Aggregation Behavior ◽

Blend Films ◽

Different Temperatures ◽

Solution Aggregation

We found that the domain size of p-DTS(FBTTh2)2/P(NDI2OD-T2) blend films was reduced in a process of aggregation limited phase separation at different temperatures.

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THE USE OF CARROT SEED OIL (DAUCUS CAROTA L.) TO FORMULATE NANOEMULGELS AS AN EFFECTIVE NATURAL SUNSCREEN AND SKIN ANTI-AGING

International Journal of Applied Pharmaceutics ◽

10.22159/ijap.2022v14i1.43481 ◽

2022 ◽

pp. 124-129

Author(s):

ANAYANTI ARIANTO ◽

HAKIM BANGUN ◽

SUMAIYAH ◽

CHRISTY NATASYA DWI YANTI PUTRI SIREGAR

Keyword(s):

Phase Separation ◽

Seed Oil ◽

Physical Stability ◽

Tween 80 ◽

High Energy ◽

Protection Factor ◽

Daucus Carota L ◽

Cycling Test ◽

Different Temperatures ◽

Carrot Seed

Objective: The purpose of this study was to develop a nanoemulgel containing vegetable oil of carrot seed oil as an effective natural sunscreen and skin anti-aging. Methods: Nanoemulgels containing 4% carrot seed oil were formulated in three formulas with different ratios of Tween 80 and Sorbitol and prepared by using the high-energy emulsification method. The nanoemulgels were determined for the organoleptic characteristic, globule size, pH, physical stability during storage for 12 w at three different temperatures (room, high and low temperature), centrifugation, and cycling test. The Sun Protection Factor (SPF) value was determined by UV spectrophotometric method and the effectiveness of anti-aging was evaluated by using a skin analyzer and the results were compared with sunscreen emulgel. Results: Nanoemulgel containing 4% carrot seed oil with a ratio of Tween 80 as surfactant and Sorbitol as co-surfactant 40 and 20 resulted in the smallest mean droplet size of 338.34 nm and the sizes were increased during 12 w of storage at room temperature but still in the nano size and this nanoemulgel did not show phase separation or still stable. These nanoemulgels were also stable after the centrifugation and cycling test. The emulgel preparation was not stable or showed phase separation after the centrifugation test. The SPF value obtained from the nanoemulgel was 20.28±0.22 and these values were higher than the sunscreen emulgel (13.94±0.27). The pore size, spot, and wrinkles of the volunteer skin were reduced after using the nanoemulgel containing 4% carrot seed. Conclusion: The sunscreen and skin anti-aging activity of nanoemulgel preparation containing 4% carrot seed oil with a ratio of surfactant Tween 80 and co-surfactant Sorbitol 40 and 20 were more effective compare with emulgel preparation.

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