Behavior of Sodium near Melting Point Found by Measurement of Sound Velocity

概要

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The sound velocity of sodium was measured in the solid phase and the liquidphase near the melting point by ultrasonic pulse transmission method. The tem-perature range of the experiment was from 19'C to 160'C, and the frequencyof sound used was 1 MHz. The sound velocity and its temperature coefficientin the solid phase just below the melting point (97.8'C) were 3180 m/s and - 1.23m/s=deg, respectively ; and those in the liquid phase just above the melting pointwere 2515 m/s and -0.52 mis-deg, respectively. By combining the present resultswith the existing data of thermal expansivity and specific heat, the elastic pro-perties of sodium at and around the melting temperature were presented anddiscussed.
社団法人日本物理学会の論文
1983-07-15