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Synthesis of Yttria Powders by Electrospray Pyrolysis

Rulison, Aaron J. and Flagan, Richard C. (1994) Synthesis of Yttria Powders by Electrospray Pyrolysis. Journal of the American Ceramic Society, 77 (12). pp. 3244-3250. ISSN 0002-7820. doi:10.1111/j.1151-2916.1994.tb04577.x.

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Electrospray atomization of high-concentration (∼400 g/L) chemical precursor solutions was applied to the synthesis of yttria powders. Conditions were found which led to high-quality powders, composed of dense, spheroidal, submicrometer, and nanocrystalline oxide particles. The precursor solutions were hydrated yttrium nitrates dissolved in n-propyl alcohol at concentrations ranging from 44.1 to 455 g/L. Electrospray atomization produced submicrometer precursor droplets which were dispersed in air and carried through an electric furnace for thermal decomposition at 500°C for several seconds residence time. X-ray powder diffraction patterns indicated the expected cubic phase. Transmission electron micrographs showed that the particle structure varied with solution composition, ranging from hollow, inflated spheres for 6-hydrated nitrates to dense spheroids for 5-hydrated nitrates. The use of 6-hydrated nitrates in the solutions appeared to form particle surfaces which were impermeable to alcohol vapor evolved during thermal decomposition, leading to hollow, inflated spheres.

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Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 1994 American Ceramic Society. Received August 21, 1992; approved September 27, 1993. Supported by the National Science Foundation under Grants Nos. CBT8813006 and CTS113191 and by GTE Laboratories, Inc., Waltham, MA.
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Issue or Number:12
Record Number:CaltechAUTHORS:20150805-112742439
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Official Citation:Rulison, A. J. and Flagan, R. C. (1994), Synthesis of Yttria Powders by Electrospray Pyrolysis. Journal of the American Ceramic Society, 77: 3244–3250. doi:10.1111/j.1151-2916.1994.tb04577.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59233
Deposited By: Irina Meininger
Deposited On:09 Dec 2015 17:54
Last Modified:10 Nov 2021 22:17

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