Characterization of Al2O3-Al nano-composite powder prepared by a wet chemical method

A wet chemical method was used to prepare Al2O3-coated Al nano-size-composite powders using Al, aluminium nitrate and ammonia as the starting materials. TEM, SEM, TG/DSC, zeta potential, XPS, XRD were used to characterise the composite powders. Results showed that a uniform thin Al(OH)3 layer formed...

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Bibliographic Details
Published in:Ceramics international 2005, Vol.31 (3), p.481-485
Main Authors: LU, Hong-Xia, JIE HU, CHEN, Chang-Ping, SUN, Hong-Wei, XING HU, YANG, De-Lin
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Cermets, ceramic and refractory composites
Chemical industry and chemicals
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Miscellaneous
Nanopowders
Nanoscale materials and structures: fabrication and characterization
Other materials
Physics
Specific materials
Technical ceramics
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Summary:A wet chemical method was used to prepare Al2O3-coated Al nano-size-composite powders using Al, aluminium nitrate and ammonia as the starting materials. TEM, SEM, TG/DSC, zeta potential, XPS, XRD were used to characterise the composite powders. Results showed that a uniform thin Al(OH)3 layer formed on the surface of Al particles. After calcined at 1000 C for 2 h, the thin Al(OH)3 layer transforms to alpha-Al2O3 with mean size about 20 nm resulting in well dispersed Al2O3-Al composite powder. 17 refs.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2004.06.014