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Zirconia Nanoparticles Made in Spray Flames at High Production Rates
Author(s) -
Mueller Roger,
Jossen Rainer,
Pratsinis Sotiris E.,
Watson Mark,
Akhtar M. Kamal
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00197.x
Subject(s) - materials science , cubic zirconia , crystallinity , monoclinic crystal system , thermogravimetric analysis , chemical engineering , particle size , tetragonal crystal system , nanoparticle , powder diffraction , analytical chemistry (journal) , crystal structure , mineralogy , crystallography , nanotechnology , composite material , chemistry , organic chemistry , ceramic , engineering
Synthesis of zirconia nanoparticles by flame spray pyrolysis (FSP) at high production rates is investigated. Product powder is collected continuously in a baghouse filter unit that is cleaned periodically by air‐pressure shocks. Nitrogen adsorption (BET), X‐ray diffractometry (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) are used to characterize the product powder. The effect of powder production rate (up to 600 g/h), dispersion gas flow rate, and precursor concentration on product particle size, crystallinity, morphology, and purity is investigated. The primary particle size of zirconia is controlled from 6 to 35 nm, while the crystal structure consists of mostly tetragonal phase (80–95 wt%), with the balance monoclinic phase at all process conditions. The tetragonal crystal size is close to the primary particle size, which indicates weak agglomeration of single crystals.