材料期刊网

Effect of Phosphates on the Metal Ion Activated Surface Complexes at the SiO_2-H_2O Interface and in Quartz Deactivation in Flotation System

SUN Zhongxi W. Forsling CHEN Jin Division of Inorganic Chemistry , Lulea University of Technology , S-951 87 Lulea , SwedenDept.of Mineral Engineering , Central South University of Technology , Changsha , 410083 , ChinaTo whom correspondence should be addressed

材料科学技术（英文）

The complexation of phosphates in the quartz-metal ion-H_2O-oleate system was studied. Computer assisted calculations with the aid of the advanced program SOLGASWATER and known equilibrium constants were used to evaluate the mechanism,The calculation results revealed that in the presence of a certain amount of phosphates, metal ions adsorbed at the quartz-H_2O interface will be transferred into solution.Thus the competi- tion for metal ions between phosphates and the quartz surface leads to surface deactivation and re- duced floatability.Various distribution diagrams clearly demonstrate the change of surface complexation as a function of added phosphate concentration.The deactivation products were also evaluated.

关键词: complexation , null , null , null , null , null

Optimization and Calculation of the Al-Be-Si System

DU Yong Q.S.Ran JIN Zhanpeng G.Effenberg DING Wei Dept.of Materials Science and Engineering , Central-South University of Technology , Changsha , 410083 , ChinaMax-Planck-Institut fur Metallforschung , Institut fur Werkstoffwissenschaften , Heisenbergstrasse 5 , D-7000

材料科学技术（英文）

Lattice stability of Be is estimated,and interaction parameters for the liquids in the Al-Be and Be-Si systems are obtained using phase dia- gram data from literatures.Using the obtained parameters and the lattice stabilities of Al and Si given in the literatures,the Al-Be and Be-Si phase diagrams are calculated.By means of Kohler's for- mula the Gibbs energy for the liquid phase in the Al-Be-Si ternary system is extrapolated.The calcu- lation shows that no excess ternary term is necessa- ry for the thermodynamic description of the system. The liquidus projection,isothermal section at 1273 K,as well as vertical sections at 94 and 88 wt-% Al and 2 wt-% Be are calculated.The calcu- lated results are in reasonable agreement with the experimental data available.

关键词: thermodynamics , null , null , null , null , null

Miscibility Gap in the Fe-Cu-Ni System at 1173 K

GAN Weiping JIN Zhanpeng Central-South University of Technology , Changsha , 410083 , ChinaTo whom correspondence should be addressed

材料科学技术（英文）

The isothermal section of the Fe-Cu-Ni ternary system at 1173 K was determined by microprobe analysis and diffusion triple technique. The experimental results show that this isothermal section only contains a miscibility gap region,and the maximal Ni content in the miscibility gap is 44.7 at.-%Ni.

关键词: Fe-Cu-Ni phase diagram , null , null

Thermodynamic Calculation of the YO_(1.5)-CaO System

DU Yong JIN Zhanpeng HUANG Peiyun ** Dept.of Materials Science and Engineering , Central South University of Technology , Changsha , 410083 , China+ To whom correspondence should be addressed

材料科学技术（英文）

关键词: thermodynamics , null , null , null