Thermophysical properties of equilibrium and supercooled liquid iridium were measured using noncontact diagnostic techniques in an electrostatic levitator. Over the 2300-3000 K temperature range, the density can be expressed as ρ(T ) = 19.5 × 10 3 − 0.85(T − T m ) (kg·m −3 ) with T m = 2719 K. The volume expansion coefficient is given by 4.4 × 10 −5 K −1 . In addition, the surface tension can be expressed as γ (T ) = 2.23 × 10 3 − 0.17(T − T m )(10 −3 N·m −1 ) over the 2373-2833 K span and the viscosity as η(T ) = 1.85 exp[3.0 × 10 4 /(RT )](10 −3 Pa·s) over the same temperature range.
Thermophysical properties of liquid and supercooled tungsten were measured using non-contact techniques in combination with an electrostatic levitator. Over the 3125-3707 K temperature range, the density measurements can be expressed as ρ(T) = 16.7(±0.33) × 10 3 -1.08(±0.08) (kg⋅m
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