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Type: Artigo de periódico
Title: Synthesis and characterization of Si-Al, Si-Ti, Si-Zr, Al-Zr, Al-Ti, and Al-Ti-Zr nanocomposites of lamellar or hexagonal structure
Author: de Farias, RF
Airoldi, C
Abstract: 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 diffraction patterns, and scanning electron microscopy, Si-Ti, Si-Zr, and AI-Ti matrices exhibit a lamellar structure, whereas the others have a hexagonal nature. With the exception of the AI-Ti matrix for which grains with spheric morphology are observed, all the other matrices exhibited grains with amorphous nature, as observed by SEM micrographs. (C) 2001 Academic Press.
Country: EUA
Editor: Academic Press Inc
Rights: fechado
Identifier DOI: 10.1006/jssc.2000.9082
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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