TEMPERATURE-DEPENDENCE OF DENSITY OF MOLTEN GERMANIUM MEASURED BY A NEWLY DEVELOPED ARCHIMEDIAN TECHNIQUE

We have developed a technique to reduce the diameter of the rod which holds a sinker used for density measurements by the Archimedian method from 0.3 to 2.0 mm. Thus, the influence of the surface tension on the rod can be canceled by extrapolation of the rod diameter to d = 0. Th is technique was applied to germanium melt for different temperatures. With increasing temperature the density decreased linearly. The obtai ned densities at 1223-1542 K show slightly higher values to those repo rted earlier. The temperature gradient is determined by partial deriva tive rho/partial derivative T = - 4.42 x 10(-4) g/cm(3) K. This is in good agreement with the value reported by Tokizaki. Moreover, it is sl ightly lower than the value reported by Glazov. (C) 1998 Elsevier Scie nce B.V. All rights reserved.