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Author Wang, Yiguang ♦ Sohn, Yongho ♦ An, Linan ♦ Fan, Yi ♦ Zhang, Ligong
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2006
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword carbonitrides ♦ diffusivity measurements ♦ error function modeling ♦ experimental study ♦ mass spectrometry ♦ oxide systems ♦ tracer diffusivity ♦ Crystallography ♦ Thermodynamics ♦ Materials Science ♦ Engineering Thermodynamics, Transport Phenomena ♦ Ceramics, Glass, Composites, Natural Methods ♦ Metallic Materials
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$^{18}$O 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.
ISSN 15477037
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2006-01-01
Publisher Place Boston
e-ISSN 18637345
Journal Journal of Phase Equilibria and Diffusion
Volume Number 27
Issue Number 6
Page Count 5
Starting Page 671
Ending Page 675

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Source: SpringerLink