Improvement of ammonium polyacrylate adsorption on Si3N4 powders by an aluminium hydroxide coating

Authors
Albano, MP Garrido, LB
Citation
Mp. Albano et Lb. Garrido, Improvement of ammonium polyacrylate adsorption on Si3N4 powders by an aluminium hydroxide coating, MATER LETT, 38(6), 1999, pp. 431-436
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS LETTERS
ISSN journal
0167577X → ACNP
Volume
38
Issue
6
Year of publication
1999
Pages
431 - 436
Database
ISI
SICI code
0167-577X(199903)38:6<431:IOAPAO>2.0.ZU;2-#
Abstract
A precipitate coating Al(OH)(3) on Si3N4 particles was shown to improve the adsorption of ammonium polyacrylate (NH(4)PA) dispersant on Si3N4. The coa ting of Al(OH)(3) on Si3N4 particles resulted in a bayerite-like surface wi th a small amount of gibbsite-like structure which improved the adsorption of a NH(4)PA dispersant. The maximum adsorption at pH 9.5 increased from 0. 01 to 0.075 mg/m(2) for the as-received and coated Si3N4 powders, respectiv ely. (C) 1999 Elsevier Science B.V. All rights reserved.