Influence of Pressure-Transmitting Media on the Lattice Vibration and Phase Transition Pressure-High Pressure Raman Spectra Studies of -Bi2O3
-
摘要: 本文分别使用4∶1的甲醇-乙醇混合溶液和固态氩做传压介质测量-Bi2O3的高压拉曼光谱。实验结果表明，传压介质对样品的谱线频移速率及相变压力有明显的影响。通过对拉曼光谱的分析认定，-Bi2O3在高压下可能经历了一次结构相变，在准静水压和非静水压条件下的相变压力分别为23.1 GPa和20.4 GPa。Abstract: High pressure Raman spectra of -Bi2O3 were measured by using a 4∶1 methanol-ehanol mixture and solid argon as pressure-transmitting media respectively. The experimental results show that the shift rates of Raman lines in the sample are distinctly affected by the pressure-transmitting media. We firmly believed that -Bi2O3 probably undergoes a structural phase transition. The phase transition pressure are 23.1 GPa and 20.4 GPa under quasi-hydrostatic condition and nonhydrostatic condition respectively.
-
Key words:
- Pressure-transmitting medium /
- Raman spectrum /
- phase transition
-
徐济安, 毛河光, Bell P M. 物理学报, 1987, 36: 501. 徐济安. 高压物理学报, 1987, 1(2): 97. Bell P M, Mao H K. Carnegie Inst Washington Yearb, 1981, 80: 404. Zou G, Bell P M, Mao H K. Carnegie Inst Washington Yearb, 1981, 80: 272. Mao H K, Xu J, Bell P M. J Geophys Res, 1986, 91: 4673. Zou G, Bell P M, Mao H K. Carnegie Inst Washington Yerab, 1982, 81: 436. Levin E M, Roth R S. J Res Nall Bur Std, 1964, 68A: 189. Betsch R J, White W B. Spectrochimica Acta, 1978, 34A: 505. Wang L Z, et al. High-Pressure Research in Mineral Physics. Tokyo: Terra Scientific Publishing Company (TERRAPUB), 1987: 299. -
点击查看大图
计量
- 文章访问数: 8494
- HTML全文浏览量: 2028
- PDF下载量: 734
下载:
