Abstract
The paper presents the results obtained when studying the adsorption and structural peculiarities of aluminum nitride nanopowder interaction with water, particularly the morphology and phase composition of oxidation products. Powder surface areas and porosities are calculated. The peculiarities of the adsorption isotherms of the investigated samples are analyzed before and after interaction with water in terms of their correspondence to a certain type according to the recommendation of the International Union for Pure and Applied Chemistry (IUPAC), as well as to a certain porosity type, which is necessary for the understanding of their further application. The mechanism of aluminum nitride powder and water interaction is discussed. It is shown that aluminum nitride interacts with water by the ion-adsorption mechanism that leads to the formation of porous agglomerates consisting of needle and platelet shaped aluminum oxyhydroxide nanoplates connected by contacts with pores 55 A in diameter. Specific surface area increases from 48 to 115 m2/g. It is also found that phase composition changes as a result of AlN nanopowder interaction with aqueous environment, and interaction products are represented by AlO(OH) and Al(OH)3 phases.
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Schedule a callMore From: Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings)
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