Title of article
Elaboration of boehmite nano-powders by spray-pyrolysis
Author/Authors
Caiut، نويسنده , , J.M.A. and Dexpert-Ghys، نويسنده , , J. and Kihn، نويسنده , , Y. and Vérelst، نويسنده , , M. and Dexpert، نويسنده , , H. M. Ribeiro، نويسنده , , S.J.L and Messaddeq، نويسنده , , Y.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
4
From page
95
To page
98
Abstract
Boehmite (γ-AlOOH) synthesis have been investigated using a spray pyrolysis (SP) device starting from a stable sol of Al-tri-sec-butoxide peptized by nitric acid. Free spherical particles from 100 to 500 nm have been elaborated. Particles sub-structure is made of nano-crystalline boehmite with very small average crystallite size (one crystal cell along the b axis). The nano-crystalline boehmite synthesized by SP at low temperature (200 °C) is spontaneously dispersible in water without any surface treatment. Boehmite powder may be transformed to transition γ-alumina by heat post-treatment. Powders of sub-micrometric and spherical γ-alumina particles may also be synthesized by SP at 700 °C.
Keywords
spray-pyrolysis , nano-powders , Boehmite , Sol–gel , alumina
Journal title
Powder Technology
Serial Year
2009
Journal title
Powder Technology
Record number
1693998
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