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

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

A precipitate coating Al(OH)3 on Si3N4 particles improved the adsorption of ammonium polyacrylate (NH4PA) dispersant on Si3N4. The coating of Al(OH)3 on Si3N4 particles resulted in a bayerite-like surface with a small amount of gibbsite-like structure which improved the adsorption of NH4PA dispersan...

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Veröffentlicht in:Materials letters 1999-03, Vol.38 (6), p.431-436
Hauptverfasser: ALBANO, M. P, GARRIDO, L. B
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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Zusammenfassung:A precipitate coating Al(OH)3 on Si3N4 particles improved the adsorption of ammonium polyacrylate (NH4PA) dispersant on Si3N4. The coating of Al(OH)3 on Si3N4 particles resulted in a bayerite-like surface with a small amount of gibbsite-like structure which improved the adsorption of NH4PA dispersant. The maximum adsorption at pH 9.5 increased from 0.01 to 0.075 mg/m2 for the as-received and coated Si3N4 powders, respectively. 12 refs.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(98)00202-X