Metastable Phase Equilibrium of a Ternary System of K+,Mg2+/B4O72--—H2O at 25°C

2013 ◽  
Vol 662 ◽  
pp. 468-472 ◽  
Author(s):  
Xiao Hua Ma ◽  
Sun Bai ◽  
Li Wu ◽  
Zhi Liang Jin
Keyword(s):  
Phase Diagram ◽  
Phase Transformation ◽  
Phase Equilibrium ◽  
Ternary System ◽  
Equilibrium State ◽  
Metastable Phase ◽  
Metastable Equilibrium ◽  
Metastable Phase Equilibrium ◽  
Isothermal Solubility

The isothermal solubility of the ternary system K+,Mg2+/B4O72-—H2O at 25°C has been studied and the phase diagram is determined. The results show that the system is of the simple eutonic type and can be in metastable equilibrium state within 8—16 hours. The phase diagram consists of two solubility branches corresponding to the crystallization areas of K2B4O7•4H2O and MgB4O7•9H2O. The composition of the eutonic point is MgB4O7,0.5279%(Wt%) and K2B4O7,13.9629%(Wt%) respectively. The replicate experiments proved that the phase transformation of hungtsaoite (MgB4O7•9H2O) occurs after a 20 hours epuilibrium.

Metastable Phase Equilibria in the Aqueous Ternary System Containing Potassium, Lithium and Chloride Ions at 298.15 K

2011 ◽  
Vol 233-235 ◽  
pp. 1619-1622 ◽  
Author(s):  
Ying Zeng ◽  
Xu Dong Yu ◽  
Jing Qiang Zhang ◽  
Long Gang Li
Keyword(s):  
Phase Diagram ◽  
Ternary System ◽  
Solid Phase ◽  
Metastable Phase ◽  
Equilibrium Phase ◽  
Chloride Ions ◽  
Crystallization Field ◽  
Metastable Equilibrium ◽  
Eutectic Type ◽  
Salting Out

The metastable phase equilibrium in the ternary system containing potassium, lithium and chloride ions was studied at 298.15 K using an isothermal evaporation method. The solubility, density and refractive index of the equilibrated solution were measured. The crystalloid forms of the solid phase were determined using a schreinermarks wet residue method. On the basis of the experimental data, the metastable equilibrium phase diagram and the physicochemical properties vs composition in the ternary system at 298.15 K were plotted. The experimental results show that this system is of a simple eutectic type system, no double salt or solid solution formed at 298.15 K. The phase diagram consists of one invariant point, two uninvariant curves, and two crystallization regions. The crystallization regions correspond to potassium chloride (KCl) and lithium chloride monohydrate (LiCl·H2O), respectively. Salt KCl has the largest crystallization field, whereas salt LiCl·H2O has the smallest crystallization field. Salt LiCl has strong salting-out effect on salt KCl.

Continuous Ordering Reactions in NiAl/Ni2, AlTi Dual Phase Alloys

1988 ◽  
Vol 133 ◽  
Author(s):  
N. C. Tso ◽  
J. M. Sanchez
Keyword(s):  
Phase Equilibrium ◽  
Ternary System ◽  
Metastable Phase ◽  
Alloy System ◽  
Cluster Variation Method ◽  
Variation Method ◽  
Dual Phase ◽  
Metastable Phase Equilibrium ◽  
Decomposition Reactions ◽  
Cluster Variation

ABSTRACTThe Cluster Variation Method is used to study metastable phase equilibrium and possible ordering reactions in the Ni2AlTi⇆;NiAl dual phase alloy system. The Cluster Variation Method was also used to model the corresponding binary alloys and the results were extrapolated to the ternary system. The occurrence of a continuous ordering reaction in the Ni-Al-Ti system is proposed and possible decomposition reactions are discussed.

Study of the stable and metastable phase equilibrium of a ternary system (NaCl + Na2SO4 + H2O) in coal-to-liquids wastewater at 323.15 K

2020 ◽  
Vol 197 ◽  
pp. 121-130
Author(s):  
Li Zhu ◽  
Yu-Long Ma ◽  
Shao-Ying Ge ◽  
Di Wu ◽  
Cheng Che ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Ternary System ◽  
Metastable Phase ◽  
Metastable Phase Equilibrium

Towards a True Fe-Ni Phase Diagram

1982 ◽  
Vol 21 ◽  
Author(s):  
P L. Rossiter ◽  
R. A Jago
Keyword(s):  
Phase Diagram ◽  
Phase Equilibrium ◽  
Phase Field ◽  
Metastable Phase ◽  
Equilibrium Diagram ◽  
Metastable Phase Diagram ◽  
Iron Meteorites ◽  
Slow Cooling ◽  
Ni Alloys ◽  
True Equilibrium

ABSTRACTA modification to the existing Fe-Ni phase equilibrium diagram is proposed that takes account of the low-temperature ordering reaction to FeNi. It is shown that true equilibrium is never attained during slow cooling of Fe-Ni alloys, even for iron meteorites (which cool extremely slowly). In all real cases, a metastable phase diagram applies, in which the depressed γ/α+γ solvus produces a more extensive γ+ FeNi phase field than for the equilibrium case. This enlarged phase field is used to explain the decomposition of supersaturated Fe-Ni to γ+ FeNi, which is observed only in iron meteorites.

Sign in / Sign up

Export Citation Format

Share Document