Adsorption of Water Vapour on Lead Borosilicate Glass in Vacuum
- 1 August 1958
- journal article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 13 (8) , 960-965
- https://doi.org/10.1143/jpsj.13.960
Abstract
The adsorption of water vapour on lead borosilicate glass was studied in the pressure region 10 -5 ∼10 -6 mmHg using the modified flashing technique. The adsorption is composed of at least two parts, the physical adsorption and the activated adsorption. The amount of the physical adsorption at 1×10 -6 mmHg, 0∼50°C was 0.1∼0.4% of a monolayer, and the heat of adsorption was 11 Kcal/mole. The activation energy of adsorption of the activated adsorption was ca. 9 Kcal/mole, and the activation energy of desorption was 13∼40 Kcal/mole.Keywords
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