The viscosity of liquid cadmium telluride

摘要

The shear viscosity of the molten CdTe with near stoichiometric initial composition was measured by using an oscillating cup viscometer up to 1403 K. The viscosity values hysteresis was obtained on heating and cooling curves. The viscosity increases from the melting point T_m up to T_m + 22 K, followed by a reduction in a narrow temperature range (2-3 K) during heating with a rate of 0.5 K/min. The reached value of the viscosity T_m + 25 ± 1 K slightly decreases up to 1403 K and monotonically increases during the next cooling with the same rate. It was concluded that the solid defect structure is influenced by the liquid CdTe viscosity dependence on temperature. The melt holding at T_m + 2 K during 112 min and at T_m + 40 K during 41 min led to the viscosity quasi-harmonic oscillation with a period of about 5 min.