The Experts below are selected from a list of 5961 Experts worldwide ranked by ideXlab platform
Tianlong Deng - One of the best experts on this subject based on the ideXlab platform.
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Solid-Liquid Phase Diagram of the Binary System Octadecanoic Acid and Octadecanol and the Thermal Chemical Property of the Composition at Eutectic Point
Journal of Chemistry, 2020Co-Authors: Can Liu, Kaiyu Zhao, Yafei Guo, Liping Guo, Tianlong DengAbstract:Phase diagram is a powerful tool to guide the exploitation of thermal energy materials. Heat storage technology of phase-change material (PCM) was widely used to solve major energy utilization problems on large energy consumption and low utilization efficiency. In this work, a novel solid-liquid phase diagram of the binary system octadecanoic acid (C18-acid) + octadecanol (C18-OH) was investigated using the differential scanning calorimeter (DSC). The phase-change temperature and phase-change enthalpies against the composition of C18-acid and C18-OH were determined experimentally, and then the binary phase diagram of T–X (X expresses the mass fraction of C18-OH in the two components of C18-acid and C18-OH) was established for the first time. The phase diagram belongs to a binary simple system with one Eutectic Point, and the content of C18-OH at Eutectic Point is 0.4 in mass fraction. Neither solid solution nor copolymer was formed. The thermal chemical properties on the phase-change latent heat (Q), phase-change temperature (Tp), and the thermal conductivity (λ) for the composition at the Eutectic Point of the binary system are 198.7 J·g−1, 44.2°C, and 0.2352 W·m−1·K−1, respectively. This result indicates that the material at Eutectic Point has a great potential to be used as energy storage material for supply of heat and scouring bath.
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metastable phase equilibrium in the aqueous ternary system li2so4 mgso4 h2o at 323 15 k
Journal of Chemical & Engineering Data, 2011Co-Authors: Tianlong Deng, Dongchan LiAbstract:The metastable solubilities and physicochemical properties (densities and refractive index) of the aqueous ternary system (Li2SO4 + MgSO4 + H2O) at 323.15 K were determined by the isothermal evaporation method. According to the experimental results, the metastable phase diagram and the diagram of physicochemical properties versus composition were plotted. It was found that there are one Eutectic Point (Li2SO4·H2O + MgSO4·6H2O), two univariant curves, and two crystallization regions corresponding to lithium sulfate monohydrate (Li2SO4·H2O) and hexahydrite (MgSO4·6H2O) in the metastable ternary system. The system belongs to a simple Eutectic type, and neither double salts nor solid solutions were found. It can be found that the solution density and refractive index of the metastable ternary system changed regularly with the content change of lithium sulfate, and all reach the maximum value at Eutectic Point. The calculated values of densities and refractive index with empirical equations are in good agreeme...
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solid liquid isothermal evaporation phase equilibria in the aqueous ternary system li2so4 mgso4 h2o at t 308 15 k
The Journal of Chemical Thermodynamics, 2008Co-Authors: Shiqiang Wang, Tianlong DengAbstract:Abstract The solubility and the density in the aqueous ternary system (Li 2 SO 4 + MgSO 4 + H 2 O) at T = 308.15 K were determined by the isothermal evaporation. Our experimental results permitted the construction of the phase diagram and the plot of density against composition. It was found that there is one Eutectic Point for (Li 2 SO 4 · H 2 O + MgSO 4 · 7H 2 O), two univariant curves, and two crystallization regions corresponding to lithium sulphate monohydrate (Li 2 SO 4 · H 2 O) and epsomite (MgSO 4 · 7H 2 O). The system belongs to a simple co-saturated type, and neither double salts nor solid solution was found. Based on the Pitzer ion-interaction model and its extended HW models of aqueous electrolyte solution, the solubility of the ternary system at T = 308.15 K has been calculated. The predicted solubility agrees well with the experimental values.
Paola Gallo - One of the best experts on this subject based on the ideXlab platform.
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molecular dynamics simulations of freezing Point depression of tip4p 2005 water in solution with nacl
Journal of Molecular Liquids, 2018Co-Authors: M M Conde, Mauro Rovere, Paola GalloAbstract:Abstract Molecular dynamics simulations have been performed on an aqueous solution of TIP4P/2005 water and NaCl using the direct coexistence technique to determine the equilibrium line ice/NaCl solution and the freezing Point depression of water in presence of NaCl at different salt concentrations below the Eutectic Point. We used large samples in order to avoid finite size effects and to minimize the error on the determination of the freezing temperature. Our results are in excellent agreement with the experimental freezing Point depression showing that the set of parameters used in this work for the water and NaCl is a very good choice to reproduce the thermodynamic properties of the water/NaCl system with molecular dynamics simulations.
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Molecular dynamics simulations of freezing-Point depression of TIP4P/2005 water in solution with NaCl
Journal of Molecular Liquids, 2018Co-Authors: M M Conde, Mauro Rovere, Paola GalloAbstract:Abstract Molecular dynamics simulations have been performed on an aqueous solution of TIP4P/2005 water and NaCl using the direct coexistence technique to determine the equilibrium line ice/NaCl solution and the freezing Point depression of water in presence of NaCl at different salt concentrations below the Eutectic Point. We used large samples in order to avoid finite size effects and to minimize the error on the determination of the freezing temperature. Our results are in excellent agreement with the experimental freezing Point depression showing that the set of parameters used in this work for the water and NaCl is a very good choice to reproduce the thermodynamic properties of the water/NaCl system with molecular dynamics simulations.
Dongchan Li - One of the best experts on this subject based on the ideXlab platform.
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metastable phase equilibrium in the aqueous ternary system li2so4 mgso4 h2o at 323 15 k
Journal of Chemical & Engineering Data, 2011Co-Authors: Tianlong Deng, Dongchan LiAbstract:The metastable solubilities and physicochemical properties (densities and refractive index) of the aqueous ternary system (Li2SO4 + MgSO4 + H2O) at 323.15 K were determined by the isothermal evaporation method. According to the experimental results, the metastable phase diagram and the diagram of physicochemical properties versus composition were plotted. It was found that there are one Eutectic Point (Li2SO4·H2O + MgSO4·6H2O), two univariant curves, and two crystallization regions corresponding to lithium sulfate monohydrate (Li2SO4·H2O) and hexahydrite (MgSO4·6H2O) in the metastable ternary system. The system belongs to a simple Eutectic type, and neither double salts nor solid solutions were found. It can be found that the solution density and refractive index of the metastable ternary system changed regularly with the content change of lithium sulfate, and all reach the maximum value at Eutectic Point. The calculated values of densities and refractive index with empirical equations are in good agreeme...
Akihisa Inoue - One of the best experts on this subject based on the ideXlab platform.
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enhanced glass forming ability of fecobsinb bulk glassy alloys prepared using commercial raw materials through the optimization of nb content
Journal of Applied Physics, 2010Co-Authors: Ying Fu, Baolong Shen, Hisamichi Kimura, Akihiro Makino, Akihisa InoueAbstract:We optimized the alloy compositions by modifying the Nb content in [(Fe0.5Co0.5)0.75B0.20Si0.05]100−xNbx(x=3.6–4.4) alloy system. As a result, it was found that the Nb content of 4.3 at. % was effective for approaching alloy to a Eutectic Point. By copper mold casting, [(Fe0.5Co0.5)0.75B0.20Si0.05]95.7Nb4.3 bulk glassy alloy rods with diameters up to 4 mm were successfully synthesized even using commercial raw materials. These glassy alloys exhibit a rather high saturation magnetization of 0.77 T and low coercive force of 2.5 A/m.
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effect of fe on the glass forming ability structure and devitrification behavior of zr cu al bulk glass forming alloys
Philosophical Magazine, 2010Co-Authors: D V Louzguineluzgin, Guoqiang Xie, Qingsheng Zhang, Akihisa InoueAbstract:We report on the glass-forming ability and devitrification behavior of Zr60Cu30Al10, Zr60Cu25Al10Fe5 and Zr62.5Cu22.5Al10Fe5 bulk glass-forming alloys on heating. The effect of Fe addition on the structure of Zr–Al–Cu alloys is also discussed. Crystallization kinetics and structural changes in the glassy alloys were studied using X-ray diffraction, transmission electron microscopy, differential scanning and isothermal calorimetry methods. The results indicate that good glass-formers, such as Zr62.5Cu22.5Al10Fe5, are located somewhat beyond the equilibrium Eutectic Point. Possible phase separation in the supercooled liquid on heating and electron beam-induced in situ crystallization are observed and discussed.
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ni free zr fe al cu bulk metallic glasses with high glass forming ability
Scripta Materialia, 2009Co-Authors: Qingsheng Zhang, Wei Zhang, Akihisa InoueAbstract:We report a series of Ni-free quaternary Zr-based bulk metallic glasses developed by substitution of Fe for Cu in ternary Zr 60 Cu 30 Al 10 alloy. Addition of Fe lowers the liquidus temperature of the ternary Zr 60 Cu 30 Al 10 alloy. The alloy compositions of Zr 60 Cu 25 Fe 5 Al 10 and Zr 62.5 Cu 22.5 Fe 5 Al 10 were found to be very near a quaternary Eutectic Point with low liquidus temperature. The as-cast glassy alloy rods with a diameter of 20 mm were easily synthesized at Zr 60 Cu 25 Fe 5 Al 10 and Zr 62.5 Cu 22.5 Fe 5 Al 10 alloy compositions by copper mold casting.
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relationship between the liquidus surface and structures of zr cu al bulk amorphous alloys
Materials Transactions, 2002Co-Authors: Yoshihiko Yokoyama, Hiroshi Inoue, Kenzo Fukaura, Akihisa InoueAbstract:By using a Al 2 O 3 cell coated with Si 3 N 4 , the melting Point (T m ) of the cast bulk amorphous samples were measured on DTA curves cooled from the molten state. Based on the T m data, the partial liquidus surface of Zr-Cu-Al ternary alloys was determined. A ternary Eutectic Point is located around Zr 50 Cu 40 Al 10 , and low melting temperatures of less than 1273 K were obtained in a wide compositional area of 40-70at%Zr, 30-60 at% Cu and 0-10 at%Al. Bulk amorphous alloys in Zr-Cu-Al ternary system were produced by an arc-casting method and the highest tensile strength of 2000 MPa was observed in Zr 50 Cu 40 Al 10 .
M M Conde - One of the best experts on this subject based on the ideXlab platform.
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molecular dynamics simulations of freezing Point depression of tip4p 2005 water in solution with nacl
Journal of Molecular Liquids, 2018Co-Authors: M M Conde, Mauro Rovere, Paola GalloAbstract:Abstract Molecular dynamics simulations have been performed on an aqueous solution of TIP4P/2005 water and NaCl using the direct coexistence technique to determine the equilibrium line ice/NaCl solution and the freezing Point depression of water in presence of NaCl at different salt concentrations below the Eutectic Point. We used large samples in order to avoid finite size effects and to minimize the error on the determination of the freezing temperature. Our results are in excellent agreement with the experimental freezing Point depression showing that the set of parameters used in this work for the water and NaCl is a very good choice to reproduce the thermodynamic properties of the water/NaCl system with molecular dynamics simulations.
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Molecular dynamics simulations of freezing-Point depression of TIP4P/2005 water in solution with NaCl
Journal of Molecular Liquids, 2018Co-Authors: M M Conde, Mauro Rovere, Paola GalloAbstract:Abstract Molecular dynamics simulations have been performed on an aqueous solution of TIP4P/2005 water and NaCl using the direct coexistence technique to determine the equilibrium line ice/NaCl solution and the freezing Point depression of water in presence of NaCl at different salt concentrations below the Eutectic Point. We used large samples in order to avoid finite size effects and to minimize the error on the determination of the freezing temperature. Our results are in excellent agreement with the experimental freezing Point depression showing that the set of parameters used in this work for the water and NaCl is a very good choice to reproduce the thermodynamic properties of the water/NaCl system with molecular dynamics simulations.
