Solid-liquid phase equilibria of the two ternary systems （NaCl＋SrCl2＋H2O） and （KCl＋SrCl2＋H2O） at T=288.15 K and p=0.1 MPa were studied using the isothermal dissolution equilibritma method. Solubilities of the ...Solid-liquid phase equilibria of the two ternary systems （NaCl＋SrCl2＋H2O） and （KCl＋SrCl2＋H2O） at T=288.15 K and p=0.1 MPa were studied using the isothermal dissolution equilibritma method. Solubilities of the equilibrium liquid phase were determined, and the solids were also investigated by the Schreinemaker method of wet residues. In the ternary system （NaCl＋SrCl2＋H2O） at 288.15 K, there is one invariant point corresponding to （NaCl＋SrCl2-6H2O） and two crystallization regions corresponding to NaC1 and SrCl2-6H2O. The crystallized area of SrCl2-6H2O decreased with the increasing temperature, while that of NaCl increased slightly. In the ternary system （KCl＋SrCl2＋H2O） at 288.15 K, there is one invariant point（KCl＋SrCl2.6H2O） and two crystallization regions cor- responding to KCl and SrCl2· 6H2O. Both systems belong to a simple eutectic type, and neither double salts nor solid solutions were formed. On the basis of Pitzer-Harvie-Weare model, the solubilities of the two systems at 288.15 K were demonstrated. A comparison showed that the calculated solubilities agreed well with the experimental data.展开更多
The phase constitutes and phase compositions in the eight alloys designed with dif-ferent compositions of Al--Zn--Cu system have been determined after the homogenous treatment and then equilibrium cooling to 20℃by us...The phase constitutes and phase compositions in the eight alloys designed with dif-ferent compositions of Al--Zn--Cu system have been determined after the homogenous treatment and then equilibrium cooling to 20℃by use of optical microscope,electron probe microanalysis and X--ray diffraction.It has been found that there existed the T'phase in the seven alloys.Consequently,it was testified that the T'phase was stable at room temperature.At the same time,the phase relationship was not locally right for the isothermal section of 20℃of Al--Zn--Cu system of the ASM published in 1997.展开更多
The chemical and electrochemical equilibria of the chlorine-titanium system in the presence of gaseous phase were investigated. Many species, which consisted of chlorine and titanium, were considered. Various thermody...The chemical and electrochemical equilibria of the chlorine-titanium system in the presence of gaseous phase were investigated. Many species, which consisted of chlorine and titanium, were considered. Various thermodynamic equilibria were calculated in the different pressures at different temperatures. The calculated results were shown as log p-1/Tand E-T diagrams. These diagrams may be used as important tools for corrosion study and titanium production. The diagrams are also used to thermodynamically determine the existence areas of various species and so on.展开更多
基金Supported by the National Natural Science Foundation of China（Nos.21406048, U1507109）, the Natttral Science Foundation of Hebei Province, China（No.B2017202198）, and the Natural Science Foundation of Tianjin, China（Nos.17JCYBJC19500, 15JCQNJC06100）.
文摘Solid-liquid phase equilibria of the two ternary systems （NaCl＋SrCl2＋H2O） and （KCl＋SrCl2＋H2O） at T=288.15 K and p=0.1 MPa were studied using the isothermal dissolution equilibritma method. Solubilities of the equilibrium liquid phase were determined, and the solids were also investigated by the Schreinemaker method of wet residues. In the ternary system （NaCl＋SrCl2＋H2O） at 288.15 K, there is one invariant point corresponding to （NaCl＋SrCl2-6H2O） and two crystallization regions corresponding to NaC1 and SrCl2-6H2O. The crystallized area of SrCl2-6H2O decreased with the increasing temperature, while that of NaCl increased slightly. In the ternary system （KCl＋SrCl2＋H2O） at 288.15 K, there is one invariant point（KCl＋SrCl2.6H2O） and two crystallization regions cor- responding to KCl and SrCl2· 6H2O. Both systems belong to a simple eutectic type, and neither double salts nor solid solutions were formed. On the basis of Pitzer-Harvie-Weare model, the solubilities of the two systems at 288.15 K were demonstrated. A comparison showed that the calculated solubilities agreed well with the experimental data.
基金This work was supported by National Natural Science Foundation of China(No.50171019)
文摘The phase constitutes and phase compositions in the eight alloys designed with dif-ferent compositions of Al--Zn--Cu system have been determined after the homogenous treatment and then equilibrium cooling to 20℃by use of optical microscope,electron probe microanalysis and X--ray diffraction.It has been found that there existed the T'phase in the seven alloys.Consequently,it was testified that the T'phase was stable at room temperature.At the same time,the phase relationship was not locally right for the isothermal section of 20℃of Al--Zn--Cu system of the ASM published in 1997.
文摘The chemical and electrochemical equilibria of the chlorine-titanium system in the presence of gaseous phase were investigated. Many species, which consisted of chlorine and titanium, were considered. Various thermodynamic equilibria were calculated in the different pressures at different temperatures. The calculated results were shown as log p-1/Tand E-T diagrams. These diagrams may be used as important tools for corrosion study and titanium production. The diagrams are also used to thermodynamically determine the existence areas of various species and so on.
