Structure of porous vycor glass and its adsorption characteristics of water —An application of positron annihilation method
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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