Accession Number:

ADA270028

Title:

Hydrolysis Reaction and Positronium Decay in Silica Gels

Descriptive Note:

Final rept. 1991-1993

Corporate Author:

TEXAS CHRISTIAN UNIV FORT WORTH

Personal Author(s):

Report Date:

1993-08-23

Pagination or Media Count:

18.0

Abstract:

Positronium decay was used to measure pore size distribution in porous sol-gel glass. It was also used to determine the population of surface strained rings at various stages of firing and drying procedures. Rotational and translational diffusion of molecular liquids, semiconductor clusters, and fullerenes was investigated. Preferential adsorption, surface interactions and their effects on electronic transitions, vibrational relaxation, rotational and translational motion were discussed. Computer simulations for molecular motion of SF 6 and cyclohexane inside small pores were run as a function of temperature and pressure. Results were compared with experimental data. Experimental evidence for the pentavalent transitions state for TMOS and TEOS hydrolysis reactions were provided.

Subject Categories:

  • Physical Chemistry
  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE