Secondary atomization as a mechanism for controlling the size of ceramic nanoparticles produced by combustion aerosol synthesis

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• 作者：Limaye ; Amit U. ; Helble ; Joseph J.
• 关键词：Ceramic oxide nanoparticles ; Droplet fragmentation ; Combustion aerosol synthesis
• 刊名：Journal of Aerosol Science
• 出版年：2004
• 出版时间：May, 2004
• 年：2004
• 卷：35
• 期：5
• 页码：599-610
• 全文大小：263 K

文摘

A novel application of the secondary atomization of precursor solution droplets is explored as a means of size control in the combustion aerosol synthesis of zirconia nanoparticles. In combustion aerosol synthesis, small precursor solution droplets are required to produce small uniformly sized nanoparticles. This study investigates the use of mixed hydrocarbon solvents to promote the fragmentation of precursor solution droplets for the production of nanoscale zirconia. By rapidly heating the droplets to the superheat limit temperature, explosive fragmentation is induced, reducing the size of the carrier droplets. Results indicate that when mixtures of hexadecane with propanol or butanol are used for precursor delivery, the sprayed droplets undergo fragmentation in the high-temperature region of a flame reactor. Consequently, zirconia nanoparticles with a number mean electrical mobility diameter of 60nm and relatively uniform sizes are produced.