Aluminum nanoparticles manufactured using a ball-milling method with ammonium chloride as a grinding aid: achieving energy release at low temperature. (4th January 2019)

• Record Type: Journal Article
• Authors: Jiang, Aifeng; Wang, Fang; Xia, Debin; Li, Mengru; Qiang, Liangsheng; Zhu, Zhaoyang; Wang, Ping; Fan, Ruiqing; Lin, Kaifeng; Yang, Yulin
• Is Part Of: New journal of chemistry. Volume 43:Number 4(2019)
• Page Start: 1851
• Page End: 1856
• Publication Date: 2019-01-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c8nj05356a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Aluminum nanoparticles were produced on a hundred-gram scale using a facile method and presented excellent stability, low oxidation initiation temperatures, and rapid combustion. Abstract : Aluminum nanoparticles are widely employed in many fields. However, methods for producing aluminum nanoparticles on a large scale are limited. In this work, we introduce a facile method for manufacturing nanosized aluminum powders on a hundred-gram scale. The key reagents used are ammonium chloride and aluminum(iii ) acetylacetonate, employed as a grinding aid and surface passivation agent, respectively. The obtained aluminum nanoparticles present excellent stability and are fully characterized by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption isotherms. Well-formed aluminum nanoparticles with average particle sizes of approximately 30 nm and high specific surface areas of over 30 m 2 g −1 can be obtained using the optimal ball-milling reaction time. In this case, the initiation temperature of oxidation was observed at approx. 150 °C and the weight increased by approx. 39% when heated under an air atmosphere. Furthermore, these aluminum nanoparticles achieved quick combustion and a flame temperature of over 1100 °C, which have not been observed using micron aluminum powders. This work provides a facile method for the industrial manufacture of high-quality nanosized aluminum powders.