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Suppressed Reactivity of AlN Powder in Water at 5 degrees C
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK), Materials Chemistry. Stockholm Univ, Berzelii Ctr EXSELENT Porous Mat, Stockholm.
2013 (English)In: Journal of The American Ceramic Society, ISSN 0002-7820, E-ISSN 1551-2916, Vol. 96, no 4, 1032-1034 p.Article in journal (Refereed) Published
Abstract [en]

The hydrolysis behavior of AlN powder suspensions (525wt%) at 5 degrees C has been investigated to explore the impact of low temperatures on the hydrolysis behavior. Throughout the 312-h long experiment, the pH value of the suspensions was below 9, where the hydrolysis remained in the induction period and was eventually suppressed due to the formation of a few-nanometers-thick film of amorphous aluminum hydroxide gel around the AlN particles, acting as a passivation layer. Moreover, the aqueous part of the suspension possessed a remarkably high value of dissolved [Al(III)]aq, being an order of magnitude higher at a given pH value than the aqueous AlCl3 solution.

Place, publisher, year, edition, pages
2013. Vol. 96, no 4, 1032-1034 p.
National Category
Ceramics Materials Engineering
URN: urn:nbn:se:su:diva-90191DOI: 10.1111/jace.12237ISI: 000317407600005OAI: diva2:623817


Available from: 2013-05-28 Created: 2013-05-28 Last updated: 2013-05-28Bibliographically approved

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Kocjan, Andraz
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