The in situ high-pressure behavior of the semiconductor antimony trioxide （Sb2O3） iS investigated by the Raman spectroscopy techniques and angle-dispersive synchrotron x-ray powder diffractfon in a diamond anvil cel...The in situ high-pressure behavior of the semiconductor antimony trioxide （Sb2O3） iS investigated by the Raman spectroscopy techniques and angle-dispersive synchrotron x-ray powder diffractfon in a diamond anvil cell up to 31.5 and 30.7 GPa, respectively. New peaks observed in the external lattice mode range in the Raman spectra at 13.5 GPa suggest that the structural phase transition occurs. The group mode （140 cm^-1） in Sb2O3 exhibits anomalous pressure dependence; that is, the frequency decreases gradually with the increasing pressure. High pressure synchrotron x-ray diffraction measurements at room temperature reveal that the transition from the orthorhombic structure to high-pressure new phase occurs at about 14.2 GPa, corresponding to the softening of the group optic mode （140cm^-1）.展开更多
The Ga Sb and In Sb binary systems were optimized using Lukas program. The thermodynamic properties and phase diagram data were evaluated by Thermo Calc package. R K polynomials and two sublattice models were used...The Ga Sb and In Sb binary systems were optimized using Lukas program. The thermodynamic properties and phase diagram data were evaluated by Thermo Calc package. R K polynomials and two sublattice models were used to describe the liquid and Ga x In 1- x Sb phases. A good description for the ternary system was obtained. It was proved to be better than those of previous work.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11304114
文摘The in situ high-pressure behavior of the semiconductor antimony trioxide （Sb2O3） iS investigated by the Raman spectroscopy techniques and angle-dispersive synchrotron x-ray powder diffractfon in a diamond anvil cell up to 31.5 and 30.7 GPa, respectively. New peaks observed in the external lattice mode range in the Raman spectra at 13.5 GPa suggest that the structural phase transition occurs. The group mode （140 cm^-1） in Sb2O3 exhibits anomalous pressure dependence; that is, the frequency decreases gradually with the increasing pressure. High pressure synchrotron x-ray diffraction measurements at room temperature reveal that the transition from the orthorhombic structure to high-pressure new phase occurs at about 14.2 GPa, corresponding to the softening of the group optic mode （140cm^-1）.
文摘The Ga Sb and In Sb binary systems were optimized using Lukas program. The thermodynamic properties and phase diagram data were evaluated by Thermo Calc package. R K polynomials and two sublattice models were used to describe the liquid and Ga x In 1- x Sb phases. A good description for the ternary system was obtained. It was proved to be better than those of previous work.
