期刊
CERAMICS INTERNATIONAL
卷 34, 期 2, 页码 409-416出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2006.10.013
关键词
powders : chemical preparation; precursors : organic; CeO2; ZrO2; spray pyrolysis; microstructure
Ultrasonic spray pyrolysis of acetate-based precursors with precisely measured precursor drop size was employed to produce ZrO2 and CeO2 particles. A bimodal size distribution of the product particles indicates a significant influence of the gas-to-particle conversion mechanism in addition to the conventionally accepted one-particle-per-drop mechanism. Due to the differences in solubility of the precursors, ZrO2 particles are spherical in shape and smooth on their surfaces while the CeO2 particles are bowl-like in shape with uneven surfaces. Spherical and monodispersed particles with a peak diameter <100 nm can be obtained by reducing the precursor concentrations to 0.01 wt.% in both the different precursor system. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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