Photometric Study of the Oxygen Diffusivity in an Aluminosilicate Glass
- 1 April 1970
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 41 (5) , 1926-1929
- https://doi.org/10.1063/1.1659143
Abstract
The diffusivity of oxygen in an aluminosilicate glass from 630° to 830°C is derived from optical transmission measurements, wherein the rate of bleaching of Ti3+ color centers by the diffusing oxygen at temperature was measured. The finite‐thickness solution to the heat equation is used to interpret the data; the oxygen diffusivity on this temperature range can be represented by D=28.4 exp (−39.6±3.4 kcal/RT)cm1/sec. It is concluded that the oxygen diffuses interstitially as molecular oxygen, because the activation energy is smaller than the energy to split an Si–O bond: 50 kcal/mole. As a check on the technique and results, penetration measurements were made on a moving color boundary, with identical results.This publication has 6 references indexed in Scilit:
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- Diffusion of Oxygen in Fused SilicaJournal of the American Ceramic Society, 1965
- Diffusion of Oxygen in Vitreous SilicaJournal of the American Ceramic Society, 1963
- Permeation of Gaseous Oxygen through Vitreous SilicaNature, 1961
- The TiO2 phase explored by the lattice constant and density methodActa Crystallographica, 1961
- Strength of Silica GlassNature, 1960