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Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion
Joint Authors
Lima, Maurício Batista de
Tercini, Marcela Bergamaschi
Santos, Sydney Ferreira
Ortega, Fernando dos Santos
Yoshimura, Humberto Naoyuki
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-07-05
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
The in situ formation of nanostructured aluminum hydroxides on the surface of alumina particles, which can work as inorganic binder, was reported in this paper.
The effect of the suspension pH during milling of alumina powder and subsequent hydrothermal treatment for the hydroxide formation and microstructure was depicted.
Under acidic pH condition, the formation of hydroxides was not observed.
When the pH of suspension changed from acidic to basic during milling, bayerite [Al(OH)3] nanoparticles were formed, but only a fraction of this hydroxide was converted to boehmite (AlOOH) during subsequent hydrothermal treatment.
The aluminum hydroxide and oxyhydroxide formed in this condition improved the smoothness of extruded rods and the strength of presintered segments.
For the powder milled under basic pH condition, the mechanochemically formed bayerite was completely converted into boehmite nanoparticles during the hydrothermal treatment.
The presence of boehmite nanoparticles contributed to improving plasticity during extrusion, which allowed the reduction of organic binder and increased the strength of presintered alumina rods.
American Psychological Association (APA)
Lima, Maurício Batista de& Tercini, Marcela Bergamaschi& Santos, Sydney Ferreira& Ortega, Fernando dos Santos& Yoshimura, Humberto Naoyuki. 2017. Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion. Journal of Nanomaterials،Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1183302
Modern Language Association (MLA)
Lima, Maurício Batista de…[et al.]. Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion. Journal of Nanomaterials No. 2017 (2017), pp.1-14.
https://search.emarefa.net/detail/BIM-1183302
American Medical Association (AMA)
Lima, Maurício Batista de& Tercini, Marcela Bergamaschi& Santos, Sydney Ferreira& Ortega, Fernando dos Santos& Yoshimura, Humberto Naoyuki. Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion. Journal of Nanomaterials. 2017. Vol. 2017, no. 2017, pp.1-14.
https://search.emarefa.net/detail/BIM-1183302
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1183302