Special features of transparent, porous alumina xerogels
The process of gelation through chemical polymerization is described for the preparation of transparent alumina. The nature of disorder in the transition phases of alumina is discussed using the results of XRD, IR, optical absorption and NMR. The microstructures in the monolithic porous xerogels are observed to be fractals arising due to instabilities while drying. Phase separation noticed in copper and chromium-doped xerogels is attributed to fluctuations in polymer density.
V Saraswati1 2
Volume 42 | Issue 5
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