Abstract
Thermophysical properties of liquid and supercooled tungsten were measured using non-contact techniques in combination with an electrostatic levitator. As the results of the present measurements over the temperature range of 3125-3707 K, the density is expressed as ρ(T) =16.7(±0.33)x10³-1.08(±0.08) (kg⋅m-3) with Tm=3695 K. The volume expansion coefficient was also expressed as 6.6 x 10-5 K-1. In addition, the surface tension is expressed as γ(T) =2.48x103(±75)-0.31(±0.08)(T-Tm) (10-3N⋅m-1) over the 3398-3695 K span and the viscosity is expressed as η(T) =0.11(±0.02)exp[12.8(±4.1)x104/(RT)] (10-3Pa⋅s) over the temperature range of 3398-3695 K.
