scholarly journals Thermodynamic analysis of the Ga-Pb binary system

2003 ◽  
Vol 39 (3-4) ◽  
pp. 465-474 ◽  
Author(s):  
Dragan Manasijevic ◽  
Dragana Zivkovic ◽  
Zivan Zivkovic
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Binary System ◽  
Binary Systems ◽  
Calculation Model ◽  
Phase Region ◽  
Miscibility Gap ◽  
Two Phase ◽  
Mixing Enthalpies

Thermodynamic properties of binary Ga-Pb alloys were investigated experimentally and analytically. Quantitative differential thermal analysis was used for determination of integral mixing enthalpies for the gallium-reach alloys, at the constant temperature inside the liquid two-phase region. Calculation of gallium activities in the temperature range of 800-1000 K was done using Chou?s calculation model developed for binary systems with miscibility gap existence.

Influence of Compressed Carbon Dioxide on the Oxidation of Cyclohexane with Hydrogen Peroxide in Acetic Acid

2006 ◽  
Vol 59 (3) ◽  
pp. 225 ◽  
Author(s):  
Liang Gao ◽  
Tao Jiang ◽  
Buxing Han ◽  
Baoning Zong ◽  
Xiaoxin Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Binary System ◽  
Reaction System ◽  
Phase Region ◽  
Phase Behaviour ◽  
Phase System ◽  
Two Phase ◽  
Three Phase

The oxidation of cyclohexane with H2O2 in a compressed CO2/acetic acid binary system was studied at 60.0 and 80.0°C, at pressures up to 18 MPa, and with the zeolite TS-1 as catalyst. The phase behaviour of the reaction system was also observed. There are three fluid phases in the reaction system at lower pressure but two at higher pressures. In the three-phase region the yields of the products, cyclohexanol and cyclohexanone, increase considerably with increasing pressure and reaches a maximum near the phase-separating pressure. CO2 can thus enhance the reaction effectively. However, the effect of pressure on the yield is very limited after the transition to a two-phase system.

Phase Diagrams of Mesogenic Binary Systems of Cobalt(II) and Univalent Metal Octanoates

2011 ◽  
Vol 66 (10-11) ◽  
pp. 661-667 ◽  
Author(s):  
Inna I. Tokmenko ◽  
Tatyana A. Mirnaya ◽  
Galina G. Yaremchuk
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Liquid Crystals ◽  
Phase Diagrams ◽  
Liquid Crystalline ◽  
Binary Systems ◽  
Polarization Microscopy ◽  
Sodium Potassium

The phase diagrams of binary systems of cobalt(II) octanoate and lithium, sodium, potassium, and thallium(I) octanoates have been studied by differential thermal analysis and polythermal polarization microscopy. In all systems, continuous or limited liquid crystalline solutions of smectic modification are formed. The temperature and composition ranges of the formation of liquid crystals and glasses have been determined.

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