Processing of Aqueous Aluminum Nitride Suspensions with High Solid Loading

The impact of different additives on the hydrolysis of AlN powder in aqueous suspensions at room temperature was studied. The results show that citric acid and polyacrylic acid are most effective in chemically protecting AlN against hydrolysis. The protected powder is hydrophilic, which facilitates...

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Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 88; no. 9; pp. 2391 - 2395
Main Authors Wildhack, Stefanie, Rixecker, Georg, Aldinger, Fritz
Format Journal Article
LanguageEnglish
Published 01.09.2005
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Summary:The impact of different additives on the hydrolysis of AlN powder in aqueous suspensions at room temperature was studied. The results show that citric acid and polyacrylic acid are most effective in chemically protecting AlN against hydrolysis. The protected powder is hydrophilic, which facilitates aqueous processing, and the chemical stability is retained when basic dispersing agents are added. Based on these results, the solid loading of the aqueous slurries was maximized by utilizing bimodal particle size distributions. Combining bimodal powders with the dispersants Dolapix and citric acid, colloidally stable slurries with solid loadings in excess of 50 vol% were obtained.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0002-7820
DOI:10.1111/j.1551-2910.2005.00467.x