VAPOR PRESSURE AND HEAT OF SUBLIMATION OF TUNGSTEN.

Abstract

The vapor pressure of tungsten was measured by the Langmuir method in the temperature range 2600 to 3100 K using a vacuum microbalance. Four series of data gave concordant results and three of the four series gave second and third law heats of sublimation in excellent agreement. Rates of vaporization are about 1/2 those previously accepted for tungsten.