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摘要: 报道了锗在高压下固化时亚稳相的形成和转化。通过原位观测锗在高压下固化过程中的电阻变化、差热信号,并结合X射线衍射分析,详细讨论了锗在高压下固化时的相演化行为。在我们所进行的实验条件下,当压力大于4 GPa时,熔态锗首先固化成金属锗,然后再向GeⅠ或GeⅢ相转变。还讨论了压力对锗的固化动力学参数的影响。Abstract: In this paper the phase evolution in the solidification process of germanium under high pressure is investigated. Data obtained on electrical resistance changes, and in situ differential thermal measurements, as well as X-ray diffraction results enable us to arrive at the phase relations and transformation processes occurred during solidification at high pressure. Under high pressure above 4 GPa, the metallic germanium phase is first solidified from the melt and then transformed into Ge Ⅰ phase and/or Ge Ⅲ phase. The kinetics of the non-equilibrium transitions is also briefly discussed.
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Key words:
- metallic germanium /
- high pressure /
- phase evolution /
- solidification
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