NaCl水溶液中的异常超声衰减
Anomalous Ultrasonic Attenuation in Aqueous NaCl Solutions
摘要：
在室温（250 ℃）下，在浓度（c）0- 5.3mol·L ~（-1）范围内，测定了频率为1 MHz和2 MHz的超声波在氯化钠水溶液中的传播速度（v）和衰减常数（a）。速度（v）显示随着c的增加而总体增加，表明溶液中占主导地位的离子和水分子之间的结合相对较强。衰减常数除了显示随c的总体增加外，在某些浓度下显示出显著的高值。试图从现有的理论背景来理解这种行为。
英文摘要：
The velocity (v) and attenuation constant (a) for ultrasonic waves of frequencies 1MHz and 2MHz propagating through aqueous sodium chloride solution have been measured over the concentration (c) region 0-5.3 mol.L-1 at room temperature (250 C). The velocity (v) shows an overall increase with the increase of c indicating comparatively stronger bonding among the ions and water molecules prevailing in the solution. The attenuation constant, besides showing an overall increase with c, shows significantly high values at some concentrations. Attempt has been made to understand the behaviour from existing theoretical background.
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