Title

Oxygen diffusion through Al-doped amorphous SiO2

Authors

Authors

Y. G. Wang; Y. H. Sohn; Y. Fan; L. G. Zhang;L. N. An

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Phase Equilib. Diffus.

Keywords

carbonitrides; diffusivity measurements; error function modeling; experimental study; mass spectrometry; oxide systems; tracer diffusivity; VITREOUS SILICA; SIALCN CERAMICS; OXIDATION; NETWORK; CARBONITRIDE; CORROSION; CARBIDE; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering

Abstract

Oxygen (O) diffusion through pure and aluminum (Al)-doped amorphous silica is investigated by,using secondary ion mass spectrometry to profile the diffusion of an O-18 tracer. The oxides are formed by the thermal oxidation of polymer-derived SiCN and SiAlCN ceramics. The authors demonstrate that a small amount of Al dopant can significantly inhibit both the interstitial and network diffusion of O. The activation energy of O network diffusion for Al-doped silica is two times higher than that for pure silica. The results are discussed in terms of the modification of Al doping on the network structure of the otherwise pure silica.

Journal Title

Journal of Phase Equilibria and Diffusion

Volume

27

Issue/Number

6

Publication Date

1-1-2006

Document Type

Article; Proceedings Paper

Language

English

First Page

671

Last Page

675

WOS Identifier

WOS:000242471200017

ISSN

1547-7037

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