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Structural studies of nanocrystalline oxides
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Savin, S. L. P., Chadwick, A. V., O'Dell, L. A. and Smith, Mark E. (2006) Structural studies of nanocrystalline oxides. In: 15th International Conference on Solid State Ionics, Baden Baden, GERMANY, 2005. Published in: Solid State Ionics, Vol.177 (No.26-32). pp. 2519-2526. doi:10.1016/j.ssi.2006.03.020 ISSN 0167-2738.
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Official URL: http://dx.doi.org/10.1016/j.ssi.2006.03.020
Abstract
We report the results of structural studies of samples of nanocrystalline tin oxide, zirconia, magnesia, alumina and silica, prepared by sol-gel techniques (including the addition of silica to restrict grain growth) and high-energy ball milling. XRD, EXAFS/YANES and MAS-NMR analyses were used to characterise the materials. EXAFS showed that nanocrystals of ZrO2 and SnO2 prepared by sol-gel methods are highly crystalline, consistent with previous EXAFS studies of sol-gel prepared nanocrystalline oxides [A.V Chadwick, M.J. Pooley, K.E. Rammutla, S.L.P. Savin, A. Rougier, J. Phys.: Condens. Matter, 15 (2003) 43 L; A.V Chadwick, G.E. Rush, in Nanocrystalline Metals and Oxides: Selected Properties and Applications, (Kluwer, New York), (2002), p. 133.]. In contrast, the sol-gel prepared SiO2 appeared amorphous, even after prolonged heating at 1200 degrees C. The EXAFS of the ball-milled samples showed clearly attenuated signals that cannot be attributed solely to particle size. Ball milling of quartz crystals (which have a simple Q(4)) first broadens the NMR line and then generates Q(3) and then Q(2) lines indicating the generation of amorphous materials in the samples.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Divisions: | Administration > University Executive Office Faculty of Science, Engineering and Medicine > Science > Physics |
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Journal or Publication Title: | Solid State Ionics | ||||
Publisher: | Elsevier Science BV | ||||
ISSN: | 0167-2738 | ||||
Official Date: | 31 October 2006 | ||||
Dates: |
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Volume: | Vol.177 | ||||
Number: | No.26-32 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 2519-2526 | ||||
DOI: | 10.1016/j.ssi.2006.03.020 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 15th International Conference on Solid State Ionics | ||||
Type of Event: | Conference | ||||
Location of Event: | Baden Baden, GERMANY | ||||
Date(s) of Event: | 2005 |
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