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Alumina Nanopowder Production from Synthetic Bayer Liquor
Author(s) -
Mazloumi Mahyar,
Khalifehzadeh Razieh,
Sadrnezhaad S. K.,
Arami Hamed
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01285.x
Subject(s) - calcination , sodium aluminate , materials science , crystallite , scanning electron microscope , aluminate , transmission electron microscopy , chemical engineering , tiron , mineralogy , differential thermal analysis , particle size , nuclear chemistry , aluminium , metallurgy , chemistry , nanotechnology , composite material , catalysis , organic chemistry , superoxide , physics , optics , cement , diffraction , engineering , enzyme
Alkoxides are the most common precursors used for the production of alumina nanopowders. These materials are, however, expensive and corrosive. This paper introduces a new method for the production of alumina nanopowders by rapid cooling of a synthetic caustic sodium aluminate solution (Bayer liquor), followed by calcination in the presence of a surface‐stabilizing agent like 1,2‐dihydroxy‐3,5‐benzene disulfonic acid disodium salt (Tiron). The powders produced are characterized by differential thermal analysis, XRD, transmission electron microscopy, scanning electron microscope, and Brunauer–Emmet–Teller. A nanopowder of α‐alumina with an average crystallite size of 27.7 nm and an average particle size of 50 nm is produced.