Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the ...Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the concentration of SDS (mnsds ) was up to 80 mmol.kg-1 The activity coefficient of water at different temperatures was calculated. The effcct of intermolecular interactions on the vapour pressure was discussed. From vapo pressure and surface tension data, the critical aggregate concentration (CAC) and polymer saturation point (PSP) were ob-tained.展开更多
The graphite phase has been extracted from the nodular cast iron to measure the concentration of trace element in it. The impurity phase was removed from the extracted matter by dissolving it with HCl and HCl+H<sub...The graphite phase has been extracted from the nodular cast iron to measure the concentration of trace element in it. The impurity phase was removed from the extracted matter by dissolving it with HCl and HCl+H<sub>2</sub>O<sub>2</sub> to get the pure graphite phase. PIXE measurements were performed with thick targets of the pure graphite phase. Differences in the trace element concentrations between the graphite phase and the matrix have been observed. The effect of Ti and As in graphite phase on the nodularization rate and the mechanical properties have been studied.展开更多
The nodular cast iron samples were prepared with the normal nodularizing process, in which the important antinodularizing elements Pb, Bi and Al were added respectively in order to research the influence of them on th...The nodular cast iron samples were prepared with the normal nodularizing process, in which the important antinodularizing elements Pb, Bi and Al were added respectively in order to research the influence of them on the nodularization of the graphites. The nodular graphites were extracted from the nodular cast iron by the electrolytic technique. The distribution of trace elements in nodular and deformed graphite were measured by Scanning Proton Microprobe (SPM). Most of the adding elements Pb, Bi and Al existed in matrix as impurities, a part of them intruded into the nodular graphites. A new suggestion of Ti antinodularizing properties had been proposed. The influence of Pb, Bi and Al on the nodularization was indirectly performed through Ti. Therefore, Ti is one of the most important antinodularizing elements.展开更多
文摘Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sill-fate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the coucentration of PEO was 0.5%, and the concentration of SDS (mnsds ) was up to 80 mmol.kg-1 The activity coefficient of water at different temperatures was calculated. The effcct of intermolecular interactions on the vapour pressure was discussed. From vapo pressure and surface tension data, the critical aggregate concentration (CAC) and polymer saturation point (PSP) were ob-tained.
文摘The graphite phase has been extracted from the nodular cast iron to measure the concentration of trace element in it. The impurity phase was removed from the extracted matter by dissolving it with HCl and HCl+H<sub>2</sub>O<sub>2</sub> to get the pure graphite phase. PIXE measurements were performed with thick targets of the pure graphite phase. Differences in the trace element concentrations between the graphite phase and the matrix have been observed. The effect of Ti and As in graphite phase on the nodularization rate and the mechanical properties have been studied.
基金The project was supported by Academia Sinica and Joint Opcn Laboratc y of Nuclear Analytical Technuiques ,Acadcmis Sinica
文摘The nodular cast iron samples were prepared with the normal nodularizing process, in which the important antinodularizing elements Pb, Bi and Al were added respectively in order to research the influence of them on the nodularization of the graphites. The nodular graphites were extracted from the nodular cast iron by the electrolytic technique. The distribution of trace elements in nodular and deformed graphite were measured by Scanning Proton Microprobe (SPM). Most of the adding elements Pb, Bi and Al existed in matrix as impurities, a part of them intruded into the nodular graphites. A new suggestion of Ti antinodularizing properties had been proposed. The influence of Pb, Bi and Al on the nodularization was indirectly performed through Ti. Therefore, Ti is one of the most important antinodularizing elements.
