Adsorption of Water Vapour on Glass and Other Materials in Vacuum

Abstract
The adsorption of water vapour on lead borosilicate glass, soda lime glass, copper, nickel and alumina ceramic in high vacuum was studied by the time lag method of molecular flow originated by Barrer. The amount of adsorption at 273°∼403°K and 2×10 -5 mmHg was found to be less than 1 % of a monolayer. It is suggested that the adsorption of water vapour in this pressure region will not be a simple physical adsorption.