Structure of porous vycor glass and its adsorption characteristics of water —An application of positron annihilation method
Positron lifetimes in porous Vycor glass have been measured. There are four lifetime components, and the fourth component has been assigned too-Ps annihilation in large pores of radius 34 Å. The intensityI 4 has been correlated to a specific surface area, but the value obtained fromI 4 by the Monte Carlo method is smaller than that obtained by the BET method. From variations in (τ4,I 4) against the kinetics of adsorption of water vapor, a rough picture of water adsorption is presented.
Index HeadingsPositron lifetime measurement Porous glass
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- 2.T. Sato, Y. Hirama: The Hokkaido Section Meeting of Japan Chemical Society (January, 1972)Google Scholar