Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
Temperature Dependence of the Velocity of Sound in Liquid Metals of Group XIV
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DOI：
10.1007/s10765-007-0151-9
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发表时间：
2007-03
影响因子：
2.2
通讯作者：
M. Hayashi;H. Yamada;N. Nabeshima;K. Nagata
中科院分区：
文献类型：
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作者：
M. Hayashi;H. Yamada;N. Nabeshima;K. Nagata
用脉冲透射法测量了Pb、Sn、Ge和Si四种液态金属在610-1078 K、608-1463 K、1215-1443 K和1723-1888 K温度范围内的声速随温度的变化关系。在液态Pb和Sn中，声速随温度的升高而线性降低，这与许多其他液态金属中所示的温度依赖性相同。另一方面，在液态锗和硅的声速表现出异常的温度依赖性。在Ge中，声速在1280 K附近具有明显的最大值，并且在较高温度下线性减小。在Si中，声速在所研究的温度范围内随着温度的增加而单调增加。这些结果预示了液态Ge和Si的配位数随温度的升高而增加。
The temperature dependences of the velocity of sound in liquid Pb, Sn, Ge, and Si have been measured by means of the pulse transmission technique over temperature ranges of 610–1078 K, 608–1463 K, 1215–1443 K, and 1723–1888 K, respectively. In both liquid Pb and Sn, the velocities of sound decrease linearly with increasing temperature, which is the same temperature dependence as shown in many other liquid metals. On the other hand, the velocities of sound in liquid Ge and Si exhibit anomalous temperature dependences. In Ge, the velocity of sound has a distinct maximum around 1280 K and decreases linearly at higher temperatures. In Si, the velocity of sound increases monotonically with increasing temperature in the temperature range investigated. It is considered that these results predict that the coordination numbers of liquid Ge and Si increase with increasing temperature.