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Synthesis and Characterization of Si–Al, Si–Ti, Si–Zr, Al–Zr, Al–Ti, and Al–Ti–Zr Nanocomposites of Lamellar or Hexagonal Structure

✍ Scribed by Robson F. de Farias; Claudio Airoldi

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
256 KB
Volume
158
Category
Article
ISSN
0022-4596

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✦ Synopsis

By using tetraethylortosilicate, titanium and zirconium tetrabutoxide, and aluminum sec-butoxide, as well as neutral 1,10 and 1,12 alkyldiamines or dodecyltrimethylammonium bromide as precursors, a series of six oxides, Si+Al, Si+Ti, Si+Zr, Al+Zr, Al+Ti, and Al+Ti+Zr, were obtained. These materials were characterized by infrared spectroscopy, thermogravimetry, Xray di4raction patterns, and scanning electron microscopy. Si+Ti, Si+Zr, and Al+Ti matrices exhibit a lamellar structure, whereas the others have a hexagonal nature. With the exception of the Al+Ti matrix for which grains with spheric morphology are observed, all the other matrices exhibited grains with amorphous nature, as observed by SEM micrographs.

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